IPD adjustments in PiTool sometimes are saved, and then at random will be reset. I have not been able to figure out what is causing them to reset to default.
My 8kx after switch games, or after coming back after a few days (I leave the pc running) it will not have tracking and the only way to get it back is to unplug both usbs and plug them back in.
I also find that one of my index controllers sometimes loses tracking and the only way to fix it is to disconnect it for several minutes. Not sure that is a Pimax problem though.