So it's a problem with the pin.
I've never used nail polish or super glue on a pin before so it might work? I'd test it out on a junker toy that you no longer care about before doing anything to an MP figure.
You might want to see if you can tap the pin out and try the nail polish/ glue trick on the holes and then re insert the pin once everything has dried.
I'd also look at other TF boards and see if anyone else is having the same problem and what they did to fix it.