diff --git a/CHANGELOG.md b/CHANGELOG.md
index c4b63382..2ebbc747 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,3 +30,4 @@
 * [UIPQB-48](https://issues.folio.org/browse/UIPQB-48) "Show columns" dropdown doesn't fit in the screen.
 * [UIPQB-47](https://issues.folio.org/browse/UIPQB-47) 400 error blocks save or further action in query builder.
 * [UIPQB-51](https://issues.folio.org/browse/UIPQB-51) Dropdown typeahead should use contains not starts with.
+* [UIPQB-55](https://issues.folio.org/browse/UIPQB-55) Regular expressions are incorrect for contains and starts_with operators
diff --git a/src/QueryBuilder/QueryBuilder/helpers/query.js b/src/QueryBuilder/QueryBuilder/helpers/query.js
index 62d6ac68..56c4db2c 100644
--- a/src/QueryBuilder/QueryBuilder/helpers/query.js
+++ b/src/QueryBuilder/QueryBuilder/helpers/query.js
@@ -47,7 +47,7 @@ export const sourceToMongoQuery = (source) => {
   const escapeRegex = (value) => {
     const escapedValue = value.replace(/[/\-\\^$*+?.()|[\]{}]/g, '\\$&');
 
-    return `^${escapedValue}`;
+    return `${escapedValue}`;
   };
 
   source.forEach((item) => {
diff --git a/src/QueryBuilder/QueryBuilder/helpers/query.test.js b/src/QueryBuilder/QueryBuilder/helpers/query.test.js
index f961e655..0ca75e03 100644
--- a/src/QueryBuilder/QueryBuilder/helpers/query.test.js
+++ b/src/QueryBuilder/QueryBuilder/helpers/query.test.js
@@ -59,12 +59,6 @@ describe('mongoQueryToSource()', () => {
       operator: { options: expect.any(Array), current: OPERATORS.CONTAINS },
       value: { current: 'abc' },
     },
-    {
-      boolean: { options: booleanOptions, current: 'AND' },
-      field: { options: fieldOptions, current: 'user_full_name' },
-      operator: { options: expect.any(Array), current: OPERATORS.CONTAINS },
-      value: { current: 'abc' },
-    },
     {
       boolean: { options: booleanOptions, current: 'AND' },
       field: { options: fieldOptions, current: 'languages' },
@@ -82,7 +76,6 @@ describe('mongoQueryToSource()', () => {
       { user_last_name: { $gte: 'value' } },
       { languages: { $in: ['value', 'value2'] } },
       { user_full_name: { $regex: 'abc' } },
-      { user_full_name: { $regex: 'abc' } },
       { languages: { $nin: ['value', 'value2'] } },
     ],
   };
@@ -122,8 +115,7 @@ describe('mongoQueryToSource()', () => {
         { user_last_name: { $lt: 10 } },
         { user_last_name: { $gte: 'value' } },
         { languages: { $in: ['value', 'value2'] } },
-        { user_full_name: { $regex: '^abc' } },
-        { user_full_name: { $regex: '^abc' } },
+        { user_full_name: { $regex: 'abc' } },
         { languages: { $nin: ['value', 'value2'] } },
       ],
     };