Type: Bug

Behaviour

Once updated the python extension from 2025.4.0 to 2025.6.0, the vscode python extension starts behaved strange.

Before the updates, there will be a tooltip for the documentation on whatever varaible, modules I highlighted. After the updates, it stopped working after a while.

It worked fine if I rollback to 2025.4.0. Is it because I am still using python3.8 instead?

Steps to reproduce:

1. Install the latest version of Python plugin
2. Mouse hover to the variable / module
3. There should be a tooltip showing the document of that variable / module
4. After a while, it stopped showing the doc, but keep showing Loading...

Diagnostic data

2025-05-13 10:22:46.286 [info] ERROR:pygls.protocol.json_rpc:Failed to handle request 80 textDocument/documentSymbol DocumentSymbolParams(text_document=TextDocumentIdentifier(uri='file:///home/vdc/....venv/lib/python3.8/site-packages/.../services.py'), work_done_token=None, partial_result_token=None)
Traceback (most recent call last):
  File "/home/vdc/.vscode-server/extensions/ms-python.python-2025.6.0-linux-x64/python_files/lib/jedilsp/jedi/cache.py", line 110, in wrapper
    return dct[key]
KeyError: ((), frozenset())

Extension version: 2025.6.0
VS Code version: Code 1.100.0 (19e0f9e681ecb8e5c09d8784acaa601316ca4571, 2025-05-07T12:48:53.763Z)
OS version: Windows_NT x64 10.0.22631
Modes:
Remote OS version: Linux x64 5.4.0-200-generic

• Python version (& distribution if applicable, e.g. Anaconda): 3.8.10
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Venv
• Value of the python.languageServer setting: Jedi

languageServer: "Jedi"

testing
• promptToConfigure: false
• pytestEnabled: true
• autoTestDiscoverOnSaveEnabled: false