diff --git a/packages/components/package-lock.json b/packages/components/package-lock.json
index 2593bef5d8..483d32dc92 100644
--- a/packages/components/package-lock.json
+++ b/packages/components/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@labkey/components",
-  "version": "7.45.6",
+  "version": "7.45.7",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@labkey/components",
-      "version": "7.45.6",
+      "version": "7.45.7",
       "license": "SEE LICENSE IN LICENSE.txt",
       "dependencies": {
         "@hello-pangea/dnd": "18.0.1",
diff --git a/packages/components/package.json b/packages/components/package.json
index 031cb7d1bf..0f8e5c98ea 100644
--- a/packages/components/package.json
+++ b/packages/components/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@labkey/components",
-  "version": "7.45.6",
+  "version": "7.45.7",
   "description": "Components, models, actions, and utility functions for LabKey applications and pages",
   "sideEffects": false,
   "files": [
diff --git a/packages/components/src/internal/components/editable/actions.test.ts b/packages/components/src/internal/components/editable/actions.test.ts
index d5823c72eb..474a2faac6 100644
--- a/packages/components/src/internal/components/editable/actions.test.ts
+++ b/packages/components/src/internal/components/editable/actions.test.ts
@@ -1812,4 +1812,40 @@ describe('resolveValueDescriptors', () => {
             resolveValueDescriptors(floatLookupCol, {}, {}, 'cellKey', { value: 1, displayValue: 'Sample 1' })
         ).toStrictEqual([{ display: 'Sample 1', raw: 1 }]);
     });
+
+    // Issue 1288: read-only columns (e.g. ancestor identifying fields) should keep the server's displayValue
+    // rather than re-deriving the display from the raw value.
+    test('readOnly columns use displayValue and skip reformatting', () => {
+        // Decimal: editable columns ignore displayValue in favor of the raw value (Issue 53934), but a
+        // read-only column should surface the server-formatted displayValue.
+        const floatCol = new QueryColumn({ fieldKey: 'col1', name: 'col1', jsonType: 'float' });
+        const readOnlyFloatCol = new QueryColumn({ fieldKey: 'col1', name: 'col1', jsonType: 'float', readOnly: true });
+        expect(
+            resolveValueDescriptors(floatCol, {}, {}, 'cellKey', { value: 1.005, displayValue: 1.01 })
+        ).toStrictEqual([{ display: 1.005, raw: 1.005 }]);
+        expect(
+            resolveValueDescriptors(readOnlyFloatCol, {}, {}, 'cellKey', { value: 1.005, displayValue: 1.01 })
+        ).toStrictEqual([{ display: 1.01, raw: 1.005 }]);
+
+        // DateTime: a read-only column returns the server displayValue verbatim instead of running the raw
+        // value through the date formatter (which, for this column's format, would produce '2023-Feb-14 06:30').
+        const readOnlyDateTimeCol = new QueryColumn({
+            fieldKey: 'col1',
+            name: 'col1',
+            rangeURI: DATETIME_RANGE_URI,
+            format: 'yyyy-MMM-dd HH:mm',
+            readOnly: true,
+        });
+        expect(
+            resolveValueDescriptors(readOnlyDateTimeCol, {}, {}, 'cellKey', {
+                value: '2023-02-14 06:30:00.000',
+                displayValue: '2023-02-14 06:30',
+            })
+        ).toStrictEqual([{ display: '2023-02-14 06:30', raw: '2023-02-14 06:30:00.000' }]);
+
+        // Read-only datetime with no displayValue falls back to the raw value (not reformatted).
+        expect(
+            resolveValueDescriptors(readOnlyDateTimeCol, {}, {}, 'cellKey', { value: '2023-02-14 06:30:00.000' })
+        ).toStrictEqual([{ display: '2023-02-14 06:30:00.000', raw: '2023-02-14 06:30:00.000' }]);
+    });
 });
diff --git a/packages/components/src/internal/components/editable/actions.ts b/packages/components/src/internal/components/editable/actions.ts
index 180737cfdf..d8127fd757 100644
--- a/packages/components/src/internal/components/editable/actions.ts
+++ b/packages/components/src/internal/components/editable/actions.ts
@@ -254,10 +254,12 @@ export function resolveValueDescriptors(
     }
 
     let display = value?.displayValue ?? raw;
-    if (col.isTimeOrDateTimeColumn) {
-        display = getDateTimeDisplayValueFromStr(raw, col);
-    } else if (!col.isLookup() && col.isDecimalJsonType) {
-        display = raw; // Issue 53934: don't use displayValue for numeric columns
+    if (!col.readOnly) {
+        if (col.isTimeOrDateTimeColumn) {
+            display = getDateTimeDisplayValueFromStr(raw, col);
+        } else if (!col.isLookup() && col.isDecimalJsonType) {
+            display = raw; // Issue 53934: don't use displayValue for numeric columns
+        }
     }
 
     return [
diff --git a/packages/components/src/internal/components/entities/actions.test.ts b/packages/components/src/internal/components/entities/actions.test.ts
index 3aaed54d36..377b87e2f3 100644
--- a/packages/components/src/internal/components/entities/actions.test.ts
+++ b/packages/components/src/internal/components/entities/actions.test.ts
@@ -119,4 +119,10 @@ describe('getFieldDisplayValue', () => {
     test('handles single-element array', () => {
         expect(getFieldDisplayValue({ value: ['only'] })).toBe('only');
     });
+
+    test('returns empty string when fieldData is missing', () => {
+        expect(getFieldDisplayValue(undefined)).toBe('');
+        expect(getFieldDisplayValue(null)).toBe('');
+        expect(getFieldDisplayValue('')).toBe('');
+    });
 });
diff --git a/packages/components/src/internal/components/entities/actions.ts b/packages/components/src/internal/components/entities/actions.ts
index df9edbcd90..abdfc528e6 100644
--- a/packages/components/src/internal/components/entities/actions.ts
+++ b/packages/components/src/internal/components/entities/actions.ts
@@ -1375,6 +1375,7 @@ export function getSingleSampleTypeQueryInfo(sampleIds: number[] | string[]): Pr
 
 // GitHub Issue 928: Spaces not shown between text choices in identifying fields in editable grid
 export function getFieldDisplayValue(fieldData: any): string {
+    if (!fieldData) return '';
     const val = fieldData.formattedValue ?? fieldData.displayValue ?? fieldData.value;
     if (Array.isArray(val)) return val.join(', ');
     return val;