I'll just remind you of something Pwiz and the other staff remind us of all the time:
Trainers on games are meant for single-player. While the trainer functions might work in multi-player/co-op modes, the trainers are not meant to be used for multiplayer. If you decide to use them in multiplayer/co-op, you take the risk of being banned for your actions by the mods of that game. It is your risk to take.
My personal advice? Don't use trainers in multiplayer/co-op modes. Ever. With the sheer number of games that are monitored by some kind of either anti-cheat or moderators, you're taking a huge risk that's not worth it. Stick to using trainers on single-player/offline modes only.
Unable to reproduce.