Sometimes, the "a", "b" and "v" keys do unexpected things.
*It seems like sometimes *a, b, and v keys behavior is normal, sometimes it BUGS.
If you press a in chat/signs, it resets the chat/sign text and writes a.
If you press b in chat/signs or walking, it toggles narrator (Active, Chat, System, None).
If you press v in chat/server informations it pastes the last stuff you CTRL + C'ed.
It's so annoying, I cannot type almost anything because a and b are some letters that you use very much.
Related issues
duplicates
Comments
violine1101
migrated
The other bug report that you've said doesn't say anything about b.
Thank you for your report!
We're actually already tracking this issue in MC-127862, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.