Automation session is sometimes empty

Testing #333367

1. Create an automation
2. Run it
3. Open the Automations view
4. Click on the run to view the session
5. Session shows ✅
6. Click on "Automations" in the Sessions sidebar to get back to the automations view
7. Click on the run again to view the session
8. Now it's empty

Possibly related console content:
```
listView.ts:1813 Measured item node at 0px- ensure that ListView is not display:none before measuring row height!
Error
at FL.probeDynamicHeights (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:715:38620)
at FL._rerender (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:715:35138)
at FL.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:715:20717)
at tOi.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:758:10245)
at Mv.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:945:59565)
at dle.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:2491:110126)
at eS._layoutListForInputHeight (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:2499:107381)
at eS.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:2499:106800)
at bEe._layoutChatWidget (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:4366:19085)
at bEe.doLayout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:4366:18758)
at bEe.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:4252:143931)
at Bue._layoutChildren (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:4251:234498)
at Bue.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:4251:234192)
at Py._layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:1358:33589)
at Py.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:1358:33349)
at ONi.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:941:61405)
at Ah.layoutViews (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:941:75494)
at Ah.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:941:67974)
at s.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:1358:24970)
at s.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:1358:36154)
at s.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:1358:46353)
at s.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:1358:51303)
at jJ._applyLayout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:4251:251808)
at jJ.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:4251:251653)
at b3._layoutChildren (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:4251:273719)
at b3.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:4251:273271)
at Py._layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:1358:33589)
at Py.layout (vscode-file://vscode-app/c:/Program%20Files/Microsoft%20VS%20Code%20Insiders/db46a82c4f/resources/app/out/vs/sessions/sessions.desktop.main.js:1358:33349)
at ONi.layout (vscode-file://vscode-app/c:/Program%20Files/Mi
probeDynamicHeights @ listView.ts:1813
_rerender @ listView.ts:1617
layout @ listView.ts:905
layout @ listWidget.ts:1719
layout @ abstractTree.ts:3025
layout @ chatListWidget.ts:1285
_layoutListForInputHeight @ chatWidget.ts:3725
layout @ chatWidget.ts:3690
_layoutChatWidget @ chatView.ts:575
doLayout @ chatView.ts:560
layout @ chatView.ts:160
_layoutChildren @ chatGroupView.ts:307
layout @ chatGroupView.ts:295
_layout @ gridview.ts:929
layout @ gridview.ts:912
layout @ splitview.ts:285
layoutViews @ splitview.ts:1361
layout @ splitview.ts:877
layout @ gridview.ts:495
layout @ gridview.ts:1199
layout @ grid.ts:339
layout @ grid.ts:859
_applyLayout @ chatGroupsView.ts:827
layout @ chatGroupsView.ts:817
_layoutChildren @ sessionView.ts:264
layout @ sessionView.ts:227
_layout @ gridview.ts:929
layout @ gridview.ts:912
layout @ splitview.ts:285
layoutViews @ splitview.ts:1361
layout @ splitview.ts:877
layout @ gridview.ts:495
layout @ gridview.ts:1199
layout @ grid.ts:339
layout @ grid.ts:859
layout @ sessionsPart.ts:410
_layout @ gridview.ts:929
layout @ gridview.ts:912
layout @ splitview.ts:285
layoutViews @ splitview.ts:1361
setViewVisible @ splitview.ts:817
setChildVisible @ gridview.ts:626
setViewVisible @ gridview.ts:1681
setViewVisible @ grid.ts:656
_applyExclusivePartVisibility @ workbench.ts:2596
(anonymous) @ workbench.ts:2547
_runWithEditorResizeSyncSuspended @ singlePaneWorkbench.ts:305
_applyCustomViewGridVisibility @ workbench.ts:2541
(anonymous) @ workbench.ts:1226
_run @ autorunImpl.ts:110
endUpdate @ autorunImpl.ts:167
finish @ transaction.ts:102
set @ observableValue.ts:77
hideCustomView @ customViewService.ts:94
_startOpenSession @ sessionsService.ts:706
openSession @ sessionsService.ts:855
openRunSession @ automationsView.ts:891
(anonymous) @ automationsView.ts:751
(anonymous) @ sessionsList.ts:4593
_deliver @ event.ts:1391
fire @ event.ts:1422
_open @ listService.ts:763
onPointer @ listService.ts:734
(anonymous) @ listService.ts:690
_deliver @ event.ts:1391
fire @ event.ts:1422
(anonymous) @ event.ts:143
_deliver @ event.ts:1391
fire @ event.ts:1422
onViewPointer @ listWidget.ts:797
onViewPointer @ abstractTree.ts:2588
(anonymous) @ event.ts:194
_deliver @ event.ts:1391
fire @ event.ts:1422
(anonymous) @ event.ts:143
_deliver @ event.ts:1391
fire @ event.ts:1422
(anonymous) @ event.ts:40
```