Tmux window title keeps renaming

Question

Suddenly, both my screen/tmux started changing my windows\' names after every command. They keep changing the name to the value of $PROMPT_COMMAND on every single a

Answer 1

Check whether your PS1 (plus PS2, PS3 or PS4 if those are set) is changing the title:

printf %q "$PS1" | grep -F '\\033'