@ to trigger autocomplete for @mention. (Optional: type a few letters of the username.)The best match (the first in the list) is selected when Enter is pressed.
The option which happens to be under the mouse is selected when Enter is pressed, even if the mouse hasn't been moved, even though the keyboard is being used. This is especially annoying when you've typed the first few letters of a username, but a different user (with those same letters somewhere in the name) is selected.
@rocket-cat label add "type: bug"
Hi @seanf
Mhhh... I can reproduce your issue on 0.63.3 but I'm not quite sure how to solve it. The folks around @karlprieb probably have an idea. I made this screen capture to illustrate the issue.

Cheers
Thomas
Thank you @seanf for your report 馃槃 馃憤
We will take a look on that, but we don't plan to fix that in the next 2 releases.
Most helpful comment
@rocket-cat label add "type: bug"
Hi @seanf
Mhhh... I can reproduce your issue on 0.63.3 but I'm not quite sure how to solve it. The folks around @karlprieb probably have an idea. I made this screen capture to illustrate the issue.
Cheers
Thomas