Yep, we had bugs even before but they have multiplied and gotten more intense since the engi patch. I was recently playing festering ground and the team made it to the 2nd tome area, i was standing on a middle level wooden platform and shooting down at some ambient enemies while overlooking a ranger collecting potions&stuff.
Anyhow i finish killing the stuff i was aiming at and take a look at the dwarf to check there is anything left when i spot a packmaster spawn without any sound 5 steps behind him and it naturally just instantly walks up and grabs him.
It spawned on flat ground without any holes out of thin air.
Thankfully everything else was dead and i could save him quickly but damn had that taken place during a fight it woulda been an instant death for him. So yeah, the sound system is borderline completely broke.
I dont dare play longbow stalker anymore, already died way too many times to getting backstabbed without any warning from silent enemies or newly spawned ones.
Even had a horde spawn ontop of me in the troll-y mines.