I dont think so, in apoc's abilities yes you dont get +1 charge when you knock out a robot, but you should still be able to get +2 charge at the start of the fight when fighting a mutant and you should still be able to keep the +2 that you got from fighting a mutant. I don't see any part in his abilities that says he wont keep his existing persistent charges against robots.
I have done that path in AQ map 5 fighting the first mutant robot previously with apoc and have always left the battle with 3 charges until the recent update/server maintenance
I have done that path in AQ map 5 fighting the first mutant robot previously with apoc and have always left the battle with 3 charges until the recent update/server maintenance I faced the same thing this week but I also considered the fact that they are not doom bots or symbiotes could be the reason why I was getting charges earlier but these bein robot is the reason I am not getting charges. ROBOTS regardless being mutant or not dont add charges to apoc.