not sure when this started happening but there is an issue as of late (maybe a month or 2) where the game is not inputing the queue for using the ult with F. gotta hit it a few times in a stress situations like horde+bosses+alot of stuff going on. seems like some input problem that changed. a few of my friends are also experiencing this.
also, i posted about the a different bug along time ago when the VMF stuff got fixed. after that fix, respawns have been VERY buggy. ppl are occupying the same spawn slot. respawned bodies are trigger pat and boss triggers. a respawned body is counting as player progress so the next spawn if 2 ppl spawn right after eachother spawns in the next next zone. this is a big problem Fatshark pls fix these spawning bug. last thing anyone wants is teammates dying and their bodies pulling boss triggers while we are already short on alive teammates while the alive ppl have to kill whatever killed that teammate!