Type hints only shows when typing something after `.`

compiler version: 10.0.1
vscode extension version: both v1.6.0 and the latest prerelease version
This happens sometimes, whether it is because my project is relatively too large(about 50k loc) for the analyser to get type informations?
See the details in the gif below.

Also, there is no type hint when i unpack a module.

This is a bug report, please post this on the appropriate issue tracker instead of the forum.