[2021] Scavenged Skills directive bug

I just had a curious experience: I answered a call for backup and joined a group running Challenging DUA (the speedrun) with Scavenged Skills and Special Ammo directives active. At first, everything functioned as normal, but after a few rooms I hit a bug where my assault turret would not register any skill parts I picked up, and so never come off cooldown. My other skill (striker drone) worked normally, picking up skill parts having their usual effect of removing the cooldown. The turret remained stuck right to the end of the mission (after which I left the session and returned to my own, without the directive active).
The only other possible information I can contribute is that the cooldown on that occasion was caused by me destroying my turret rather than picking it up as I usually do (the turret had 'slipped' slightly into some railings on placement and the game wouldn't let me pick it back up).
I attach a brief video of me picking up skill parts and them not counting towards the turret's cooldown: