diff --git a/apps/desktop/src/components/grid/DataGrid.vue b/apps/desktop/src/components/grid/DataGrid.vue
index b5449e6871..b10acaaa07 100644
--- a/apps/desktop/src/components/grid/DataGrid.vue
+++ b/apps/desktop/src/components/grid/DataGrid.vue
@@ -599,6 +599,7 @@ let preservedSelectionOnNextResult: {
 } | null = null;
 let preservedDetailsOnNextResult: {
   sideCell?: PersistedDataGridSelection;
+  sideCellHasPendingDraft?: boolean;
   cellDialog?: PersistedDataGridSelection;
   rowDialog?: PersistedDataGridSelection;
   columnDialog?: PersistedDataGridSelection;
@@ -5942,6 +5943,10 @@ function captureColumnTargetForRefresh(columnIndex: number | null): PersistedDat
 function captureDetailsForRefresh() {
   const details = {
     sideCell: showCellDetail.value ? captureCellTargetForRefresh(detailCell.value) : undefined,
+    // A refresh must not silently discard an unsaved value-editor draft: closing
+    // and reopening the panel (even at the "same" cell) would re-derive its text
+    // from the freshly fetched row, wiping whatever the user was typing.
+    sideCellHasPendingDraft: showCellDetail.value && hasPendingDetailEditorDraft.value,
     cellDialog: cellDetailDialogOpen.value ? captureCellTargetForRefresh(cellDetailDialogTarget.value) : undefined,
     rowDialog: rowDetailDialogOpen.value ? captureRowTargetForRefresh(rowDetailDialogRowId.value) : undefined,
     columnDialog: columnDetailDialogOpen.value ? captureColumnTargetForRefresh(columnDetailDialogColumnIndex.value) : undefined,
@@ -5965,11 +5970,17 @@ function restoreDetailCellAfterRefresh(snapshot: PersistedDataGridSelection | un
 }
 
 function restoreDetailsAfterRefresh(details: NonNullable<typeof preservedDetailsOnNextResult>) {
-  const sideCell = restoreDetailCellAfterRefresh(details.sideCell);
-  if (sideCell) {
-    detailCell.value = sideCell;
-    showCellDetail.value = true;
-    hydrateCellDetailTarget(sideCell);
+  // When the side panel was left open with an unsaved value-editor draft, it was
+  // deliberately kept open (not closed) across this refresh, so there is nothing
+  // to restore here - reassigning detailCell would re-derive the editor text from
+  // the freshly fetched row and clobber the draft the user is still editing.
+  if (!details.sideCellHasPendingDraft) {
+    const sideCell = restoreDetailCellAfterRefresh(details.sideCell);
+    if (sideCell) {
+      detailCell.value = sideCell;
+      showCellDetail.value = true;
+      hydrateCellDetailTarget(sideCell);
+    }
   }
 
   const cellDialog = restoreDetailCellAfterRefresh(details.cellDialog);
@@ -6461,6 +6472,12 @@ watch(activeCellDetailTab, (tab) => {
 const detailEditValue = ref("");
 const detailEditOriginalValue = ref("");
 const isEditingDetail = ref(false);
+// commitDetailEdit() intentionally re-triggers the activeCellDetail watch below to
+// re-sync the editor with the canonical committed value. Any other change to the
+// same cell's underlying data while still editing (e.g. a result refresh, or a
+// large-value hydration resolving) must not clobber the user's in-progress draft.
+let allowActiveCellDetailResync = false;
+let lastSyncedDetailCellKey: string | null = null;
 const detailValueDiffOpen = ref(false);
 const detailValueDiffSnapshot = ref<Readonly<JsonValueDiffSnapshot> | null>(null);
 const hasPendingDetailEditorDraft = computed(() => isEditingDetail.value && detailEditValue.value !== detailEditOriginalValue.value);
@@ -6591,6 +6608,15 @@ watch(activeCellDetail, (detail) => {
     resetDetailEdit();
     return;
   }
+  const cellKey = `${detail.rowId}:${detail.colIndex}`;
+  const isSameCellStillEditing = isEditingDetail.value && cellKey === lastSyncedDetailCellKey;
+  lastSyncedDetailCellKey = cellKey;
+  if (isSameCellStillEditing && !allowActiveCellDetailResync) {
+    // The row's underlying data changed (e.g. a result refresh or a large-value
+    // hydration) while the user is still editing this same cell. Keep their draft.
+    return;
+  }
+  allowActiveCellDetailResync = false;
   const value = dataGridCellEditorText({
     value: detail.value,
     databaseType: resolvedDatabaseType.value,
@@ -6668,6 +6694,7 @@ function resetDetailEdit() {
   isEditingDetail.value = false;
   detailEditValue.value = "";
   detailEditOriginalValue.value = "";
+  lastSyncedDetailCellKey = null;
 }
 
 function closeCellDetails() {
@@ -6741,6 +6768,9 @@ function commitDetailEdit() {
   if (!item || item.isDeleted) return;
   applyCellValue(detail.rowId, detail.colIndex, detailEditValue.value);
   detailEditOriginalValue.value = detailEditValue.value;
+  // Force the activeCellDetail watch to re-run so the editor picks up the
+  // canonical (possibly coerced) committed value.
+  allowActiveCellDetailResync = true;
   detailCell.value = detailCell.value ? { ...detailCell.value } : null;
 }
 
@@ -10529,7 +10559,10 @@ watch(
     clearCellSelection();
     clearRowSelection();
     invalidateContextMenuTarget();
-    closeCellDetails();
+    // Don't discard an unsaved value-editor draft just because the result set
+    // refreshed underneath it; leave the panel/editor state as-is and let
+    // restoreDetailsAfterRefresh() below skip re-opening it from fresh data.
+    if (!detailsSnapshot?.sideCellHasPendingDraft) closeCellDetails();
     closeDetailDialogs();
     if (shouldPreserveTranspose) {
       applyTransposeState(nextTransposeStateForRecordCount(showTranspose.value, transposeRowIndex.value, displayRowCount.value));