You've never given an argument why the unit is beyong fixable beside "there's no analogue". There's also no real analogue for the Brummbär, the 222, the 251, Sturmpioneers etc etc. Should they all be removed now?
Although I generally agree, that is a pretty wrong analogy. ZiS gun bug will always be a disadvantage for the owner. IR-HT bug will always be an advantage for the owner.
It's been bugged since day 1 of WFA. It was harder to proc earlier on, cause suppression platforms for OKW were Kubel and Flak HT at that moment. MG34 was doctrinal and in a paid commander. I can't find an older thread but here is a reply from that time in this forum.
This bug is in our database, Thanks
They will later re-introduce the same mechanic in another unit, which fortunately, was unpopular (Valentine). In the rework, they actually removed this mechanic from the unit.
It's not a bug which was introduced later through patches. The bug is on the inherent nature of the mechanic itself.