diff --git a/src/problems/analytical_problems.jl b/src/problems/analytical_problems.jl
index 7dabf9807..d6b744885 100644
--- a/src/problems/analytical_problems.jl
+++ b/src/problems/analytical_problems.jl
@@ -10,11 +10,12 @@ struct AnalyticalProblem{uType, tType, isinplace, P, F, K} <:
     kwargs::K
     @add_kwonly function AnalyticalProblem{iip}(f, u0, tspan, p = NullParameters();
         kwargs...) where {iip}
+        _u0 = prepare_initial_state(u0)
         _tspan = promote_tspan(tspan)
         warn_paramtype(p)
-        new{typeof(u0), typeof(_tspan), iip, typeof(p),
+        new{typeof(_u0), typeof(_tspan), iip, typeof(p),
             typeof(f), typeof(kwargs)}(f,
-            u0,
+            _u0,
             _tspan,
             p,
             kwargs)
diff --git a/src/problems/bvp_problems.jl b/src/problems/bvp_problems.jl
index 2e9f1feab..3baf71215 100644
--- a/src/problems/bvp_problems.jl
+++ b/src/problems/bvp_problems.jl
@@ -110,6 +110,7 @@ struct BVProblem{uType, tType, isinplace, P, F, BF, PT, K} <:
 
     @add_kwonly function BVProblem{iip}(f::AbstractBVPFunction{iip, TP}, bc, u0, tspan,
         p = NullParameters(); problem_type=nothing, kwargs...) where {iip, TP}
+        _u0 = prepare_initial_state(u0)
         _tspan = promote_tspan(tspan)
         warn_paramtype(p)
         prob_type = TP ? TwoPointBVProblem() : StandardBVProblem()
@@ -119,8 +120,8 @@ struct BVProblem{uType, tType, isinplace, P, F, BF, PT, K} <:
         else
             @assert prob_type === problem_type "This indicates incorrect problem type specification! Users should never pass in `problem_type` kwarg, this exists exclusively for internal use."
         end
-        return new{typeof(u0), typeof(_tspan), iip, typeof(p), typeof(f), typeof(bc),
-            typeof(problem_type), typeof(kwargs)}(f, bc, u0, _tspan, p, problem_type,
+        return new{typeof(_u0), typeof(_tspan), iip, typeof(p), typeof(f), typeof(bc),
+            typeof(problem_type), typeof(kwargs)}(f, bc, _u0, _tspan, p, problem_type,
             kwargs)
     end
 
diff --git a/src/problems/dae_problems.jl b/src/problems/dae_problems.jl
index 5d729cd8d..e5e532aac 100644
--- a/src/problems/dae_problems.jl
+++ b/src/problems/dae_problems.jl
@@ -80,21 +80,23 @@ struct DAEProblem{uType, duType, tType, isinplace, P, F, K, D} <:
         du0, u0, tspan, p = NullParameters();
         differential_vars = nothing,
         kwargs...) where {iip}
-        if !isnothing(u0)
+        _u0 = prepare_initial_state(u0)
+        _du0 = prepare_initial_state(du0)
+        if !isnothing(_u0)
             # Defend against external solvers like Sundials breaking on non-uniform input dimensions.
-            size(du0) == size(u0) ||
+            size(_du0) == size(_u0) ||
                 throw(ArgumentError("Sizes of u0 and du0 must be the same."))
             if !isnothing(differential_vars)
-                size(u0) == size(differential_vars) ||
+                size(_u0) == size(differential_vars) ||
                     throw(ArgumentError("Sizes of u0 and differential_vars must be the same."))
             end
         end
         _tspan = promote_tspan(tspan)
         warn_paramtype(p)
-        new{typeof(u0), typeof(du0), typeof(_tspan),
+        new{typeof(_u0), typeof(_du0), typeof(_tspan),
             isinplace(f), typeof(p),
             typeof(f), typeof(kwargs),
-            typeof(differential_vars)}(f, du0, u0, _tspan, p,
+            typeof(differential_vars)}(f, _du0, _u0, _tspan, p,
             kwargs, differential_vars)
     end
 
diff --git a/src/problems/dde_problems.jl b/src/problems/dde_problems.jl
index 3bf2df8f2..98dfc4a0c 100644
--- a/src/problems/dde_problems.jl
+++ b/src/problems/dde_problems.jl
@@ -224,11 +224,13 @@ struct DDEProblem{uType, tType, lType, lType2, isinplace, P, F, H, K, PT} <:
         order_discontinuity_t0 = 0,
         problem_type = StandardDDEProblem(),
         kwargs...) where {iip}
+        _u0 = prepare_initial_state(u0)
         _tspan = promote_tspan(tspan)
         warn_paramtype(p)
-        new{typeof(u0), typeof(_tspan), typeof(constant_lags), typeof(dependent_lags),
+        new{typeof(_u0), typeof(_tspan), typeof(constant_lags), typeof(dependent_lags),
             isinplace(f),
-            typeof(p), typeof(f), typeof(h), typeof(kwargs), typeof(problem_type)}(f, u0, h,
+            typeof(p), typeof(f), typeof(h), typeof(kwargs), typeof(problem_type)}(f, _u0,
+            h,
             _tspan,
             p,
             constant_lags,
diff --git a/src/problems/discrete_problems.jl b/src/problems/discrete_problems.jl
index 9d6f643e9..b2f2a362c 100644
--- a/src/problems/discrete_problems.jl
+++ b/src/problems/discrete_problems.jl
@@ -90,12 +90,13 @@ struct DiscreteProblem{uType, tType, isinplace, P, F, K} <:
     @add_kwonly function DiscreteProblem{iip}(f::AbstractDiscreteFunction{iip},
         u0, tspan::Tuple, p = NullParameters();
         kwargs...) where {iip}
+        _u0 = prepare_initial_state(u0)
         _tspan = promote_tspan(tspan)
         warn_paramtype(p)
-        new{typeof(u0), typeof(_tspan), isinplace(f, 4),
+        new{typeof(_u0), typeof(_tspan), isinplace(f, 4),
             typeof(p),
             typeof(f), typeof(kwargs)}(f,
-            u0,
+            _u0,
             _tspan,
             p,
             kwargs)
diff --git a/src/problems/implicit_discrete_problems.jl b/src/problems/implicit_discrete_problems.jl
index 063a96d2e..b6463fa6b 100644
--- a/src/problems/implicit_discrete_problems.jl
+++ b/src/problems/implicit_discrete_problems.jl
@@ -86,12 +86,13 @@ struct ImplicitDiscreteProblem{uType, tType, isinplace, P, F, K} <:
         u0, tspan::Tuple,
         p = NullParameters();
         kwargs...) where {iip}
+        _u0 = prepare_initial_state(u0)
         _tspan = promote_tspan(tspan)
         warn_paramtype(p)
-        new{typeof(u0), typeof(_tspan), isinplace(f, 6),
+        new{typeof(_u0), typeof(_tspan), isinplace(f, 6),
             typeof(p),
             typeof(f), typeof(kwargs)}(f,
-            u0,
+            _u0,
             _tspan,
             p,
             kwargs)
diff --git a/src/problems/rode_problems.jl b/src/problems/rode_problems.jl
index d5c04e21b..18c7a587e 100644
--- a/src/problems/rode_problems.jl
+++ b/src/problems/rode_problems.jl
@@ -69,12 +69,13 @@ mutable struct RODEProblem{uType, tType, isinplace, P, NP, F, K, ND} <:
         rand_prototype = nothing,
         noise = nothing, seed = UInt64(0),
         kwargs...) where {iip}
+        _u0 = prepare_initial_state(u0)
         _tspan = promote_tspan(tspan)
         warn_paramtype(p)
-        new{typeof(u0), typeof(_tspan),
+        new{typeof(_u0), typeof(_tspan),
             isinplace(f), typeof(p),
             typeof(noise), typeof(f), typeof(kwargs),
-            typeof(rand_prototype)}(f, u0, _tspan, p, noise, kwargs,
+            typeof(rand_prototype)}(f, _u0, _tspan, p, noise, kwargs,
             rand_prototype, seed)
     end
     function RODEProblem{iip}(f, u0, tspan, p = NullParameters(); kwargs...) where {iip}
diff --git a/src/problems/sdde_problems.jl b/src/problems/sdde_problems.jl
index 12cafe9d7..76d4b8dc4 100644
--- a/src/problems/sdde_problems.jl
+++ b/src/problems/sdde_problems.jl
@@ -126,12 +126,13 @@ struct SDDEProblem{uType, tType, lType, lType2, isinplace, P, NP, F, G, H, K, ND
                   det(f.mass_matrix) != 1,
         order_discontinuity_t0 = 0 // 1,
         kwargs...) where {iip}
+        _u0 = prepare_initial_state(u0)
         _tspan = promote_tspan(tspan)
         warn_paramtype(p)
-        new{typeof(u0), typeof(_tspan), typeof(constant_lags), typeof(dependent_lags),
+        new{typeof(_u0), typeof(_tspan), typeof(constant_lags), typeof(dependent_lags),
             isinplace(f),
             typeof(p), typeof(noise), typeof(f), typeof(g), typeof(h), typeof(kwargs),
-            typeof(noise_rate_prototype)}(f, g, u0, h, _tspan, p, noise, constant_lags,
+            typeof(noise_rate_prototype)}(f, g, _u0, h, _tspan, p, noise, constant_lags,
             dependent_lags, kwargs, noise_rate_prototype,
             seed, neutral, order_discontinuity_t0)
     end
diff --git a/src/problems/steady_state_problems.jl b/src/problems/steady_state_problems.jl
index 5a01410b9..ed4fd3a05 100644
--- a/src/problems/steady_state_problems.jl
+++ b/src/problems/steady_state_problems.jl
@@ -83,8 +83,9 @@ struct SteadyStateProblem{uType, isinplace, P, F, K} <:
     @add_kwonly function SteadyStateProblem{iip}(f::AbstractODEFunction{iip},
         u0, p = NullParameters();
         kwargs...) where {iip}
+        _u0 = prepare_initial_state(u0)
         warn_paramtype(p)
-        new{typeof(u0), isinplace(f), typeof(p), typeof(f), typeof(kwargs)}(f, u0, p,
+        new{typeof(_u0), isinplace(f), typeof(p), typeof(f), typeof(kwargs)}(f, _u0, p,
             kwargs)
     end