Incorrect assign type mismatch when assigning multiple times on the same line

[Nexela]

This might be a seperate bug
With ---@Class double: number

Latest Vscode, Latest Master

[sumneko]

This might be a seperate bug
With ---@Class double: number

You cannot convert parent type to child type.
You may use ---@alias double number

[sumneko]

I cannot reproduce the issue of this title, please provide a more simple demo

EDIT: I can reproduce it with ---@alias double number