InputTextMultiline: fixed an issue where edit buffer wouldn't be reapplied to back buffer on the IsItemDeactivatedAfterEdit() frame. (#9308, #8915, #8273)

docs/CHANGELOG.txt

@@ -88,6 +88,10 @@ Other Changes:
     large amount of text.
   - InputTextMultiline: avoid going through reactivation code and fixed losing revert value
     when activating scrollbar.
+  - InputTextMultiline: fixed an issue where edit buffer wouldn't be reapplied to back
+    buffer on the IsItemDeactivatedAfterEdit() frame. This could create issues when
+    using the idiom of not applying edits before IsItemDeactivatedAfterEdit().
+    (#9308, #8915, #8273)
 - Style:
   - Border sizes are now scaled (and rounded) by ScaleAllSizes().
   - When using large values with ScallAllSizes(), the following items thickness

imgui_widgets.cpp

@@ -4731,6 +4731,11 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
         draw_window->DC.NavLayersActiveMaskNext |= (1 << draw_window->DC.NavLayerCurrent); // This is to ensure that EndChild() will display a navigation highlight so we can "enter" into it.
         draw_window->DC.CursorPos += style.FramePadding;
         inner_size.x -= draw_window->ScrollbarSizes.x;
+
+        // FIXME: Could this be a ImGuiChildFlags to affect the SetLastItemDataForWindow() call?
+        g.LastItemData.ID = id;
+        g.LastItemData.ItemFlags = item_data_backup.ItemFlags;
+        g.LastItemData.StatusFlags = item_data_backup.StatusFlags;
     }
     else
     {