Agents Window - Sessions with Folder - Cannot open changes

[alexdima]

• I configured "sessions.layout.singlePaneDetailPanel": true but did not reload the window (maybe related to this?)
• Have a folder with a branch which is not main with 1 commit
• Changes show Branch Changes
• 🐛 cannot open the diffs

ERR s: Assertion Failed: Argument is `undefined` or `null`.
    at RE (assert.ts:51:6)
    at Ki (types.ts:118:2)
    at ZNe.getEditorPaneDescriptor (editorPanes.ts:320:1)
    at ZNe.openEditor (editorPanes.ts:136:1)
    at editorGroupView.ts:1268:1
    at Db.doShowEditor (editorGroupView.ts:1292:1)
    at Db.doOpenEditor (editorGroupView.ts:1250:1)
    at Db.openEditor (editorGroupView.ts:1154:1)
    at _he.openEditor (editorService.ts:592:16)
    at IGe.openChangesEditor (sessionChangesService.ts:103:1)
    at BSe._openMultiFileDiffEditor (changesView.ts:1420:1)
    at Fye.value (changesView.ts:805:1)
    at T._deliver (event.ts:1364:13)
    at T.fire (event.ts:1395:9)
    at Dmi._open (listService.ts:763:1)
    at Dmi.onPointer (listService.ts:734:1)
    at Fye.value (listService.ts:690:1)
    at T._deliver (event.ts:1364:13)
    at T.fire (event.ts:1395:9)
    at Fye.value (event.ts:143:84)
    at T._deliver (event.ts:1364:13)
    at T.fire (event.ts:1395:9)
    at ami.onViewPointer (listWidget.ts:797:19)
    at ami.onViewPointer (abstractTree.ts:2438:1)
    at Fye.value (event.ts:194:85)
    at T._deliver (event.ts:1364:13)
    at T.fire (event.ts:1395:9)
    at Fye.value (event.ts:143:84)
    at T._deliver (event.ts:1364:13)
    at T.fire (event.ts:1395:9)
    at HTMLDivElement.i (event.ts:40:41)

Screen.Recording.2026-07-04.at.20.54.06.mov

Version: 1.128.0-insider
Commit: 7317e60fe47bea256caf45ef830427365e4e6b3d
Date: 2026-07-04T09:31:19Z
Electron: 42.5.0
ElectronBuildId: 14525058
Chromium: 148.0.7778.271
Node.js: 24.17.0
V8: 14.8.178.33-electron.0
OS: Darwin arm64 25.5.0