I get that with one light in my fairly large scene… goes from 80+fps to 10 so it is totally unusable for actual game use or I am doing something wrong >.> with many lights it is down to like 4-5 completely freezing up my editor as well so I cannot do anything but forcibly close the process.
edit:
Also getting an weird with matinee, shaders are compiling whether vxgi is enabled or not… not really sure what is going on but it only happens when using the movie tool to export out the video, doesn’t matter if it is in images or an actual video it always has to compile shaders and that ruins the entire cinematic…