-While posing the Jail Scene Joker the sculpted forearms would like to come out more than I feel they should. So with that I think those magnets should be stronger. Same with the magnets in the gloved hands, though I never had any issues with the gloved hands falling out.
Check the arm magnets, mine where the same way and I checked and one of the arms was missing its magnet completely. Happened twice actually with the extra set of seamed forearms as well.