Well the trainers share the same OT Name, however something is missing/invalid which causes the game to crash. The only way i see to fix this is to trade with someone with the same ID, SID and Name. Then the game would overwrite the data.
If that trade list has a limit, then trading a lot of times would eventually remove that trainer from the list, but im unsure of this.
The trainer in unity tower doesnt crash so there must be some Trade Rendezvous specific data that is missing and causes it to crash when it loads the list.
I was wondering if someone who uses the IR-GTS has the same problem. I'm almost sure that the IR-GTS did this, but i need more people to confirm this.
Also does this happen when using other programs such as ShinyGTS?