Hey there @Sabranise! Welcome to the community! This occurs sometimes when the TDR limit trips. Since you tried most of the other recommendations you may have already changed that limit, if not try that.
If not, try getting a bit more GPU overhead from trying some of the things in this thread (not just me):
I know you can’t go from DX12 to DX11 and keep Lumen so ignore that recommendation from that thread.
Is your GPU maxing out during the rendering process?