vscode: Cannot execute cell or save Jupyter Notebook in remote VS connection opened with showNotebookDocument API

• VS Code Version: 1.55.0-insider Commit: 6f726bcdf6a4d6cb518a3fcdb03c21be7293f417
• OS Version: Win 10 Enterprise 10.0.19042

Steps to Reproduce:

1. Inside the resolve() function open .ipynb file using vscode.window.showNotebookDocument([fileUri]);

• Notebook is open and rendered fine using native notebooks
• Cannot execute cells
• Cannot save changes

Full log attached. full_log.txt

notificationsAlerts.ts:40 Failed to save 'test.ipynb': NO notebook document for 'file:///home/azureuser/cloudfiles/code/test.ipynb' onDidChangeNotification @ notificationsAlerts.ts:40 console.ts:137 [Extension Host] Kernel: connected (e2434543-78ef-4522-969d-c701497f1f15) console.ts:137 [Extension Host] Starting WebSocket: ws://localhost:8891/api/kernels/147d0cee-7924-402f-97d0-383ba5c2da51 console.ts:137 [Extension Host] Kernel: connected (147d0cee-7924-402f-97d0-383ba5c2da51) log.ts:296 ERR Invalid uri, not a notebook: /home/azureuser/cloudfiles/code/test.ipynb: Error: Invalid uri, not a notebook: /home/azureuser/cloudfiles/code/test.ipynb at s.getTextDocumentWrapper (/home/azureuser/.vscode-server-insiders/extensions/ms-python.python-2021.3.680753044/out/client/extension.js:61:198474) at s.toOutgoingDocument (/home/azureuser/.vscode-server-insiders/extensions/ms-python.python-2021.3.680753044/out/client/extension.js:61:192283) at t.NotebookMiddlewareAddon.provideHover (/home/azureuser/.vscode-server-insiders/extensions/ms-python.python-2021.3.680753044/out/client/extension.js:61:186794) at y.callNext (/home/azureuser/.vscode-server-insiders/extensions/ms-python.python-2021.3.680753044/out/client/extension.js:9:431693) at y.provideHover (/home/azureuser/.vscode-server-insiders/extensions/ms-python.python-2021.3.680753044/out/client/extension.js:9:429657) at y.o.value (/home/azureuser/.vscode-server-insiders/extensions/ms-python.python-2021.3.680753044/out/client/extension.js:9:432312) at Object.provideHover (/home/azureuser/.vscode-server-insiders/extensions/ms-python.python-2021.3.680753044/out/client/extension.js:9:136682) at /home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:86:159486 at /home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:64:12046 at new Promise (<anonymous>) at g (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:64:12018) at l.provideHover (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:86:159466) at /home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:86:182161 at Ie._withAdapter (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:86:178959) at Ie.$provideHover (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:86:182137) at u._doInvokeHandler (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:90:12794) at u._invokeHandler (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:90:12478) at u._receiveRequest (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:90:11094) at u._receiveOneMessage (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:90:9931) at /home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:90:8032 at b.fire (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:57:1836) at E.fire (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:65:15496) at /home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:105:29935 at b.fire (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:57:1836) at E.fire (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:65:15496) at t._receiveMessage (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:65:20754) at /home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:65:17640 at b.fire (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:57:1836) at acceptChunk (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:65:12861) at /home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:65:12209 at b.fire (/home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:57:1836) at /home/azureuser/.vscode-server-insiders/bin/6f726bcdf6a4d6cb518a3fcdb03c21be7293f417/out/vs/server/remoteExtensionHostProcess.js:105:18820 at afterWrite (_stream_writable.js:490:5) at onwrite (_stream_writable.js:470:7) at InflateRaw.afterTransform (_stream_transform.js:98:3) at Zlib.processCallback (zlib.js:578:8)