4.26 FPS loss

So i had read there was framerate loss in 4.26 , so i gave it a try and sure enough on a same map i was getting 75 to 78 fps is down to 50 fps . Many people have reported this kind of thing , so i am wondering if there was any info on this or someone might know what causes it or if something can be done ? , There are some things in 4.26 i could really use , but its hard with such a drop in FPS right off the top. I do not have ray tracing enabled and that experimental water plugin is not enabled either. Is there something that changed in 4.26 in general that could cause that kind of FPS loss across the board?