Certain Pokemon added through PKHex unusable? (PLZA)

[ShadyBoots]

I play the Switch Pokemon games through an emulator and use PKHex every time to give myself my favorite Pokemon, I play completely offline so I've never given any thought to legality or cared to, since I'm just messing around and playing for fun, making them overpowered by maxing out their EVs/IVs, illegal moves, etc. PKHex hasn't given me any issues in the previous games I've played (Shield, Arceus, Violet) but something weird happened with Legends Z-A. The Pokemon I give myself through PKHex sometimes just stand still and can't move whatsoever. My Ralts for example is able to be let out of its ball and attack a few times but then it just stops, sometimes mid-battle. I also gave myself Diancie and it's completely unusable. There's no effect whenever I let it out of its ball or put it back in. Nothing happens when I try to use moves. It's completely glitched out and I'm not certain why.

I'm playing version 2.0.0 of Z-A on Ryujinx. The game itself performs just fine and Pokemon I get in the game act normally. Has anyone else experienced something similar? Do I have to be extra careful about legality in order for Pokemon I add through PKHex to function properly in-game? Is PKHex even the problem at all? Cause I'm not even sure what's causing it. Any help is appreciated, thank you.

[Kaphotics]

Don't overwrite party pokemon that have mega stones/currently sent out.

Try again only editing your boxes; switch them in and out of your party.