MAJOR FPS DROP FOR MAC PLAYERS IN ROTATING GAME MODES

Seriously I've been having this issue for at least half a year and Riot doesn't have any solutions to their improper formatting/rendering of objects. I've been trying to isolate this incident and it only happens in rotating game modes when I am in base after a load. If I move out of base and then reconnect it solves the problem, however it pisses my team off because I have to automatically reconnect to fix the FPS drop issue. Hope this sort of helps but Riot needs to get on top of this asap.