diff --git a/core/src/callback.jl b/core/src/callback.jl
index ee49c6086..0ac0701d4 100644
--- a/core/src/callback.jl
+++ b/core/src/callback.jl
@@ -277,7 +277,10 @@ function discrete_control_affect_upcrossing!(integrator, condition_idx)
     # only possibly the du. Parameter changes can change the flow on an edge discontinuously,
     # giving the possibility of logical paradoxes where certain parameter changes immediately
     # undo the truth state that caused that parameter change.
-    is_basin = id_index(basin.node_id, discrete_control.listen_node_id[condition_idx])[1]
+    listen_node_ids = discrete_control.listen_node_id[condition_idx]
+    is_basin =
+        length(listen_node_ids) == 1 ? id_index(basin.node_id, only(listen_node_ids))[1] :
+        false
     # NOTE: The above no longer works when listen feature ids can be something other than node ids
     # I think the more durable option is to give all possible condition types a different variable string,
     # e.g. basin.level and level_boundary.level
@@ -374,7 +377,7 @@ function discrete_control_affect!(
             discrete_control.logic_mapping[(discrete_control_node_id, truth_state)]
         else
             error(
-                "Control state specified for neither $truth_state_crossing_specific nor $truth_state for DiscreteControl node $discrete_control_node_id.",
+                "Control state specified for neither $truth_state_crossing_specific nor $truth_state for $discrete_control_node_id.",
             )
         end
 
diff --git a/core/src/validation.jl b/core/src/validation.jl
index 202eec6a8..478fca586 100644
--- a/core/src/validation.jl
+++ b/core/src/validation.jl
@@ -552,29 +552,32 @@ function valid_discrete_control(p::Parameters, config::Config)::Bool
             end
         end
     end
-    for (Δt, var, node_id) in zip(look_ahead, variable, listen_node_id)
-        if !iszero(Δt)
-            node_type = node_id.type
-            # TODO: If more transient listen variables must be supported, this validation must be more specific
-            # (e.g. for some node some variables are transient, some not).
-            if node_type ∉ [NodeType.FlowBoundary, NodeType.LevelBoundary]
-                errors = true
-                @error "Look ahead supplied for non-timeseries listen variable '$var' from listen node $node_id."
-            else
-                if Δt < 0
+    for (look_aheads, variables, listen_node_ids) in
+        zip(look_ahead, variable, listen_node_id)
+        for (Δt, var, node_id) in zip(look_aheads, variables, listen_node_ids)
+            if !iszero(Δt)
+                node_type = node_id.type
+                # TODO: If more transient listen variables must be supported, this validation must be more specific
+                # (e.g. for some node some variables are transient, some not).
+                if node_type ∉ [NodeType.FlowBoundary, NodeType.LevelBoundary]
                     errors = true
-                    @error "Negative look ahead supplied for listen variable '$var' from listen node $node_id."
+                    @error "Look ahead supplied for non-timeseries listen variable '$var' from listen node $node_id."
                 else
-                    node = getfield(p, graph[node_id].type)
-                    idx = if node_type == NodeType.Basin
-                        id_index(node.node_id, node_id)
-                    else
-                        searchsortedfirst(node.node_id, node_id)
-                    end
-                    interpolation = getfield(node, Symbol(var))[idx]
-                    if t_end + Δt > interpolation.t[end]
+                    if Δt < 0
                         errors = true
-                        @error "Look ahead for listen variable '$var' from listen node $node_id goes past timeseries end during simulation."
+                        @error "Negative look ahead supplied for listen variable '$var' from listen node $node_id."
+                    else
+                        node = getfield(p, graph[node_id].type)
+                        idx = if node_type == NodeType.Basin
+                            id_index(node.node_id, node_id)
+                        else
+                            searchsortedfirst(node.node_id, node_id)
+                        end
+                        interpolation = getfield(node, Symbol(var))[idx]
+                        if t_end + Δt > interpolation.t[end]
+                            errors = true
+                            @error "Look ahead for listen variable '$var' from listen node $node_id goes past timeseries end during simulation."
+                        end
                     end
                 end
             end
diff --git a/core/test/control_test.jl b/core/test/control_test.jl
index fdb2e80f8..55d934a10 100644
--- a/core/test/control_test.jl
+++ b/core/test/control_test.jl
@@ -54,7 +54,7 @@ end
     p = model.integrator.p
     (; discrete_control, flow_boundary) = p
 
-    Δt = discrete_control.look_ahead[1]
+    Δt = discrete_control.look_ahead[1][1]
 
     t = Ribasim.tsaves(model)
     t_control = discrete_control.record.time[2]
@@ -78,7 +78,7 @@ end
     p = model.integrator.p
     (; discrete_control, level_boundary) = p
 
-    Δt = discrete_control.look_ahead[1]
+    Δt = discrete_control.look_ahead[1][1]
 
     t = Ribasim.tsaves(model)
     t_control = discrete_control.record.time[2]