Uncomment code (CTRL + K + U) only works when the session is disconnected in SQL Server Management Studio v18.4

Question

Does anyone have the solution to the following issue happening in the SSMS v18.4 ?

We are unable to uncomment code in the SQL Server session by pressing the designated shortcut ( CTRL + K + U ) while the session is connected to SQL Server instance. It only works when the session is disconnected (mostly when we open the SSMS and let sessions in disconnected mode).

Please find the version, OS details as below:

When the session is in disconnected mode, pressing CTRL + K + U works fine:

otherwise, pressing CTRL + K + U acts like pressing CTRL+U (select database shortcut) only:

It's very strange and I couldn't find a solution yet.

I have also checked in the SSMS options and it says the same but doesn't work

Answer 1

The default is:

CTRL + K + C 

to comment and

CTRL + K + U

to remove comment.