Random crashes when using multimonitors

Hi, i recently started working with 2 monitors using the show adjacent documents (not sure about the english term) and expanding the window to span both monitors. I started to have some crashes here and there and i noticed a slight decrease in performance but it was okay, but this last few days i had lots of random crashes and a few of them had corrupted the backup files (when opening the program again and acepting to restore the session it crashed instantly). Are there any known bugs when using multimonitors? I tried to reproduce some of the crashes but i couldnt and they seem to be totally unrelated, like using the search box in the workspace, changing a notehead and a few other settings in the inspector, clicking on a harmonic or some random text. Note that all of these things work most of the time but they randomly crash occasionaly. Could this be related to the performance decrease? My cpu is not working even at half its capacity when running musescore so i dont really understand. I dont work with huge scores, the most i use is 13 instruments, and probably have 2 or 3 scores open at the same time.