Bug with buzzer and plasma sentry

[Stavrophore]

So ive killed two faceless plus mindreader in buzzer shop, but left plasma sentry alive in his shop. It was aggroed before but ive entered stealth. Quest was completed, and i could talk with buzzer. Later ive returned to his shop, and buzzer started shooting at blue[ally] plasma sentry. Militiaman killed buzzer. This is seriously game breaking, ive saved buzzer to have access to his shop and now he is dead...

https://i.imgur.com/9FA9ghb.png

[PhrygianDominant]

Would you mind uploading your save (autosave at the transition to the shop or just before entering) and posting it here? You could use Dropbox, Google Drive, or any cloud service of your choosing.

I need to pinpoint the issue and hopefully eradicate this damn bug once and for all.