diff --git a/frontend/src/features/missions/MissionForm/MissionForm.tsx b/frontend/src/features/missions/MissionForm/MissionForm.tsx
index 8ea6857c60..ee846a3a1c 100644
--- a/frontend/src/features/missions/MissionForm/MissionForm.tsx
+++ b/frontend/src/features/missions/MissionForm/MissionForm.tsx
@@ -1,12 +1,12 @@
 import {
   Banner,
+  type ControlUnit,
+  customDayjs,
   FormikEffect,
   Icon,
   Level,
   THEME,
-  customDayjs,
-  usePrevious,
-  type ControlUnit
+  usePrevious
 } from '@mtes-mct/monitor-ui'
 import { useMissionEventContext } from 'context/mission/useMissionEventContext'
 import { useFormikContext } from 'formik'
@@ -23,6 +23,7 @@ import { ExternalActionsModal } from './ExternalActionsModal'
 import { FormikSyncMissionFields } from './FormikSyncMissionFields'
 import { GeneralInformationsForm } from './GeneralInformationsForm'
 import { useMissionAndActionsCompletion } from './hooks/useMissionAndActionsCompletion'
+import { useSyncFormValuesWithRedux } from './hooks/useSyncFormValuesWithRedux'
 import { useUpdateOtherControlTypes } from './hooks/useUpdateOtherControlTypes'
 import { useUpdateSurveillance } from './hooks/useUpdateSurveillance'
 import { MissionFormBottomBar } from './MissionFormBottomBar'
@@ -31,8 +32,8 @@ import { getIsMissionFormValid, isMissionAutoSaveEnabled, shouldSaveMission } fr
 import { missionsAPI } from '../../../api/missionsAPI'
 import {
   FrontCompletionStatus,
-  MissionSourceEnum,
   type Mission,
+  MissionSourceEnum,
   type NewMission
 } from '../../../domain/entities/missions'
 import { sideWindowPaths } from '../../../domain/entities/sideWindow'
@@ -98,6 +99,7 @@ export function MissionForm({
 
   const isFormDirty = useMemo(() => selectedMissions[id]?.isFormDirty ?? false, [id, selectedMissions])
 
+  useSyncFormValuesWithRedux(isAutoSaveEnabled)
   const { missionCompletionFrontStatus } = useMissionAndActionsCompletion()
   useUpdateSurveillance()
   useUpdateOtherControlTypes()
@@ -177,14 +179,6 @@ export function MissionForm({
   }
 
   const validateBeforeOnChange = useDebouncedCallback(async (nextValues, forceSave) => {
-    dispatch(
-      missionFormsActions.setMission({
-        engagedControlUnit,
-        isFormDirty,
-        missionForm: nextValues
-      })
-    )
-
     if (!isAutoSaveEnabled || engagedControlUnit || !isMissionFormValid) {
       return
     }
@@ -194,7 +188,7 @@ export function MissionForm({
     }
 
     dispatch(saveMission(nextValues, false, false))
-  }, 150)
+  }, 300)
 
   useEffect(() => {
     if (isNewMission && !engagedControlUnit && previousEngagedControlUnit !== engagedControlUnit) {
diff --git a/frontend/src/features/missions/MissionForm/hooks/useSyncFormValuesWithRedux.ts b/frontend/src/features/missions/MissionForm/hooks/useSyncFormValuesWithRedux.ts
new file mode 100644
index 0000000000..bba1b86142
--- /dev/null
+++ b/frontend/src/features/missions/MissionForm/hooks/useSyncFormValuesWithRedux.ts
@@ -0,0 +1,66 @@
+import { useAppDispatch } from '@hooks/useAppDispatch'
+import { useAppSelector } from '@hooks/useAppSelector'
+import { useFormikContext } from 'formik'
+import { useEffect } from 'react'
+import { useDebouncedCallback } from 'use-debounce'
+
+import { missionFormsActions } from '../slice'
+import { getIsMissionFormValid } from '../utils'
+
+import type { Mission } from 'domain/entities/missions'
+
+export function useSyncFormValuesWithRedux(isAutoSaveEnabled: boolean) {
+  const dispatch = useAppDispatch()
+  const { dirty, values } = useFormikContext<Mission>()
+  const activeMissionId = useAppSelector(state => state.missionForms.activeMissionId)
+  const activeMission = useAppSelector(state =>
+    activeMissionId ? state.missionForms.missions[activeMissionId] : undefined
+  )
+  const engagedControlUnit = useAppSelector(state =>
+    activeMissionId ? state.missionForms.missions[activeMissionId]?.engagedControlUnit : undefined
+  )
+
+  const dispatchFormUpdate = useDebouncedCallback(async (newValues: Mission) => {
+    if (!newValues || newValues.id !== activeMissionId) {
+      return
+    }
+
+    const isFormDirty = isMissionFormDirty()
+
+    dispatch(
+      missionFormsActions.setMission({
+        engagedControlUnit,
+        isFormDirty,
+        missionForm: newValues
+      })
+    )
+  }, 350)
+
+  /**
+   * The form is dirty if:
+   * - In auto-save mode, an error is found (hence the form is not saved)
+   * - In manual save mode, values have been modified (using the `dirty` props of Formik)
+   */
+  function isMissionFormDirty() {
+    if (!isAutoSaveEnabled) {
+      if (dirty) {
+        return dirty
+      }
+
+      /**
+       * If the form was already dirty and still open, the new `dirty` property is not valid anymore as Formik
+       * has been re-instantiated with the saved values.
+       * We use the last `isFormDirty` value instead of `dirty`.
+       */
+      return activeMission?.isFormDirty ?? false
+    }
+
+    const isMissionFormValid = getIsMissionFormValid(values)
+
+    return !isMissionFormValid
+  }
+
+  useEffect(() => {
+    dispatchFormUpdate(values)
+  }, [values, dispatchFormUpdate])
+}