At the start of “We’ve Got Hostiles” if you toss a grenade down towards the trip mine (that usually kills the scientist) and trigger the Fire Door, the glass on the door opener is unbreakable and you can’t proceed
The only workaround I could find for this is to crouch right in front of it and then look up at it and press the use key (default E) which opens the door. I hope that helps.
Or you could use sv_cheats 1 and then type noclip.
Although I’m sure your workaround is appreciated, I think the sole purpose of Hawk-kun’s post is as a bug report for the Devs to investigate.
Yeah I am aware, I just thought I’d put it out there in case he or someone else needed it.