Pacific Rim transcends your puny mortal concerns about "plot holes".
Anyway, there was one thing that bugged me about Outcast, which for those don't recall was a PC game that was likely most notable for it's use of voxels instead of polygons. Anyway, if there one thing that always bugged me about that game, it was the cloaking device that you picked up at some point. As one would expect from a cloaking device, it makes you invisible. However, like the cloaking devices used in a certain other popular franchise, you couldn't use you couldn't use your weapons while cloaked. I am of course referring to Star Trek and you could at least find a way to explain it in that context (I'm not sure if it was ever explained officially): the cloaking device would use up so much energy to run, they wouldn't have anything left to put into weapons.
However, in Outcast, your weapons were basically just regular firearms for the most part. Unless I'm much mistaken, portable firearms tend not to require an external power supply. Not only that, but you couldn't even use your fists while cloaked. OK, so it was clearly done that way to avoid the game becoming too easy, but it still irked me that there was no in-game explanation as to why you couldn't even engage in fisticuffs while cloaked. Though I suppose, it was the 90s..