Indeed it was.

I am also having issues with FAF self-deleting upon install.....since it self-deleted the first time today.

No warning before self-deletion.

I created a lobby like normal, game launched to lobby, then FAF was deleted. And continues to do so every time i install it.

I tried installing an older version too and that seemed to not self-delete but......can't play on outdated versions.

I can't remember the fix(unfortunately) but i think i know the cause; play in FAF then try to play in Steam(jump between them), sound issues ensue....at least this is what happened to me.