Just downloaded and installed this afternoon's latest 18.1 build but still NO improvement!
There is no logic, the crashes are totally random, sometimes a video works but try it later and it crashes. (Using Wrapper and Blu-Ray patch).
Another thing, I can't get rid of subtitles ... they always appear on screen. If I switch them off, when I start the video again they are back. On Kodi 17.5 the settings for each video were saved. Not with 18???
No problems with Kodi 18 (64bit) on my Samsung Galaxy Tab though!!!