Problem with stationary overlapping light

Hello
I’m working on an endless runner game for android and I’m trying to optimize its performance. When looking at the optimization view modes, specifically the one that says “stationary light overlap”, the main character appears all red, even when I only have one light in the entire map, I tried with the ue4 mannequin and still the same thing. How could I figure out what’s going on?

I have the same problem but can’t find out what’s the problem. Did you managed to solve the issue?