What is happening right now?

Hi, so I'm making a pretty simple platform game with 3 different types of platforms and 1 moving platform. The problem I'm having is that when I'm jumping to other platforms, when I sometimes go off the platform the "gravity" does not work like my actor will just be walking on air. It seems to be happening with 2 platforms only and I'm not sure why.<Code Omitted> I'll post my code but it might be a bit tricky to understand. hopefully someone can help me! thanks.