Update 02: I have noticed one thing that while Leaking GPU usage is 0%…even while playing in editor GPU usage was 0% but game was running 32 FPS (as I mentioned in console command otherwise it going beyond 32 fps) but still GPU usage 0% …seems like to me that leakage is simply all about the data from GPU or GPU response itself is totally lost for realtime rendering or whatever feature in UE4 that use GPU for realtime rendering sending (populating) all data directly into memory(RAM) thinking RAM as GPU.