When clicking the More link in the AC popup,
I expect to see a documentation popup.
But I see nothing.
This commit introduced this behavior 19df9e19afeb0f32064a8b7e3a11ebaa4254f63c
If I checkout the commit before 19df9e19afeb0f32064a8b7e3a11ebaa4254f63c, everything works as expected.
Can you post some logs for the relevant completion item and the resolve request?
I have a fix. It's due to the server not supporting the resolve provider.
Confirmed as fixed