Constant crashing and lagging

I have edited a video and I’m still not even halfway done with it due to Shotcut constantly lagging and me having a “Not responding” notification. I am trying to play the last clip I added to my video and it stops just 2 seconds into the clip. After that I could no longer press any button (even trying to close the software itself).

Playing the video from the start works but in this clip, it clearly doesn’t!

I have tried changing the Display Method settings but I’m not really sure it works for me!

system spec? also is gpu acelleration on?

i am using a microsoft surface pro 4 with 128 gb storage
Screen: 12.3” PixelSense™ Display
Resolution: 2736 x 1824 (267 PPI)
Aspect Ratio: 3:2
Windows 10 and i5 Intel HD Graphics 520.

Last time I checked, the GPU Processing isn’t on.

I hope these information can help!