[Error] unhandlederror-TreeError [AgentSessionsView] Tree element not found: [object Object]

## Error Message
````
unhandlederror-TreeError [AgentSessionsView] Tree element not found: [object Object]
````

## Stack Trace
    at V_i.getCompressedNode ([./src/vs/base/browser/ui/tree/compressedObjectTreeModel.ts:347:9](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/tree/compressedObjectTreeModel.ts#L347))
    at V_i.getNode ([./src/vs/base/browser/ui/tree/compressedObjectTreeModel.ts:263:20](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/tree/compressedObjectTreeModel.ts#L263))
    at t0t.getNode ([./src/vs/base/browser/ui/tree/compressedObjectTreeModel.ts:488:40](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/tree/compressedObjectTreeModel.ts#L488))
    at JLe.getNode ([./src/vs/base/browser/ui/tree/abstractTree.ts:2939:0](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/tree/abstractTree.ts#L2939))
    at jw.getNode ([./src/vs/base/browser/ui/tree/asyncDataTree.ts:879:0](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/tree/asyncDataTree.ts#L879))
    at l ([./src/vs/platform/list/browser/listService.ts:1249:0](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/platform/list/browser/listService.ts#L1249))
    at updateCollapseContextKeys ([./src/vs/platform/list/browser/listService.ts:1278:0](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/platform/list/browser/listService.ts#L1278))
    at D._deliver ([./src/vs/base/common/event.ts:1391:12](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/common/event.ts#L1391))
    at D.fire ([./src/vs/base/common/event.ts:1422:8](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/common/event.ts#L1422))
    at (anonymous) ([./src/vs/base/common/event.ts:143:83](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/common/event.ts#L143))
    at h_e.value ([./src/vs/base/common/event.ts:1821:15](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/common/event.ts#L1821))
    at D._deliver ([./src/vs/base/common/event.ts:1391:12](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/common/event.ts#L1391))
    at D._deliverQueue ([./src/vs/base/common/event.ts:1402:8](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/common/event.ts#L1402))
    at D.fire ([./src/vs/base/common/event.ts:1426:8](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/common/event.ts#L1426))
    at Ptt._set ([./src/vs/base/browser/ui/tree/abstractTree.ts:2289:0](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/tree/abstractTree.ts#L2289))
    at Ptt.set ([./src/vs/base/browser/ui/tree/abstractTree.ts:2279:0](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/tree/abstractTree.ts#L2279))
    at O_i.setFocus ([./src/vs/base/browser/ui/tree/abstractTree.ts:2563:0](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/tree/abstractTree.ts#L2563))
    at O_i.focusNth ([./src/vs/base/browser/ui/list/listWidget.ts:1923:8](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/list/listWidget.ts#L1923))
    at O_i.focusFirst ([./src/vs/base/browser/ui/list/listWidget.ts:1914:7](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/list/listWidget.ts#L1914))
    at JLe.focusFirst ([./src/vs/base/browser/ui/tree/abstractTree.ts:3065:0](https://github.com/microsoft/vscode/blob/a5b500951314efd502d07465bd138dfbd714a960/src/vs/base/browser/ui/tree/abstractTree.ts#L3065))

Raw Stack Trace (minified)

````
Error: TreeError [AgentSessionsView] Tree element not found: [object Object] at V_i.getCompressedNode (out/vs/workbench/workbench.desktop.main.js:946:14730) at V_i.getNode (out/vs/workbench/workbench.desktop.main.js:946:13537) at t0t.getNode (out/vs/workbench/workbench.desktop.main.js:946:17050) at JLe.getNode (out/vs/workbench/workbench.desktop.main.js:946:217) at jw.getNode (out/vs/workbench/workbench.desktop.main.js:946:34629) at l (out/vs/workbench/workbench.desktop.main.js:946:67848) at h_e.value (out/vs/workbench/workbench.desktop.main.js:946:68549) at D._deliver (out/vs/workbench/workbench.desktop.main.js:433:3642) at D.fire (out/vs/workbench/workbench.desktop.main.js:433:3961) at out/vs/workbench/workbench.desktop.main.js:431:11603 at h_e.value (out/vs/workbench/workbench.desktop.main.js:433:7201) at D._deliver (out/vs/workbench/workbench.desktop.main.js:433:3642) at D._deliverQueue (out/vs/workbench/workbench.desktop.main.js:433:3731) at D.fire (out/vs/workbench/workbench.desktop.main.js:433:4066) at Ptt._set (out/vs/workbench/workbench.desktop.main.js:945:45405) at Ptt.set (out/vs/workbench/workbench.desktop.main.js:945:45284) at O_i.setFocus (out/vs/workbench/workbench.desktop.main.js:945:48875) at O_i.focusNth (out/vs/workbench/workbench.desktop.main.js:758:12673) at O_i.focusFirst (out/vs/workbench/workbench.desktop.main.js:758:12571) at JLe.focusFirst (out/vs/workbench/workbench.desktop.main.js:946:2335) at jw.focusFirst (out/vs/workbench/workbench.desktop.main.js:946:36957) at MN.focus (out/vs/workbench/workbench.desktop.main.js:3511:33132) at pT.focusSessions (out/vs/workbench/workbench.desktop.main.js:3511:61817) at s.run (out/vs/workbench/workbench.desktop.main.js:3324:46558)
````

## Details
| Property | Value |
| --- | --- |
| Bucket ID | [`fa2da98a-30f6-5a22-f607-a6ad75e36c20`](https://errors.code.visualstudio.com/bucket/fa2da98a-30f6-5a22-f607-a6ad75e36c20?product=VSCode&extension=core&commit=a5b500951314efd502d07465bd138dfbd714a960) |
| Version | 1.133.0 |
| Commit | [`a5b50095`](https://insiders.vscode.dev/github/microsoft/vscode/tree/a5b500951314efd502d07465bd138dfbd714a960) |
| Last Seen | Wed Aug 12 2026 23:53:33 GMT+0000 (Coordinated Universal Time) |
| Platforms | Mac, Windows, Linux |
| Product | VSCode |

---
*This issue was automatically created from the VS Code Errors Dashboard*