Firecontrol not being repaired in WWII Campaign

[SgK]

I've been playing the long campaign for some time now and it seems that the "Fire Control"
value is not being reset when repairing between battles.
This is bug has been since v1.0 but has not been corrected (I'm using 2.3).
The only way to fix this is by editing the save which is a pain or "upgrade" to the same
vehicle and lose the exp.
If this is not a bug but a "feature" of some
difficulty of getting spareparts it would be
nice to have a switch for it.
The above might be true for the "Range Finder" value too but have not looked into it. I got somewhat suspicious when my elite AT-guns started to get 15 to 25% to hit at 3 hexes in clear weather.