Pressing Tab changes weapon

[CinemaMan]

Description
When I press Tab on any server, the chat rolls down, which is normal. But when I press Tab again to close the chat - it normally closes BUT this also changes my weapon to the next one in the wep list. How do I fix this?

Reproducible
Always

What you were doing when the bug happened
No matter, it's a chat bug

What you think caused the bug
Idk

[2b2ttianxiu]

your option settings