No lighting in android ? Unreal Engine 5.1 ?

Hello,
I just upgraded my projects for Unreal Engine 5.1. I don’t know if this is version related, but my lighting for my android project is really really weird. I have 3 point lights, all static, lighting build. This is in the viewport :

And this is on mobile preview (and on my phone when I tested it) :

Has anybody an idea of what’s happening ?

Really no idea ? …