I have 6 screens with 2 GTX 1070 TI and nvidia xinerama settings enabled (ubuntu 18.04 Mate). I can use all applications correctly except chrome : when I do a right click, the menu is shown with an offset equivalent to 2 screens (3840px) to the left. Idem for select options and any contextual menu (title on html element, even the 3 dot option in the top right corner for chrome options). I saw some posts about this problem in earlier chrome versions but I failed to make it work here.
I don't find anything related in recent chrome version (mine is Version 79.0.3945.88 (Official Build) (64-bit))
Demo with right click : See the mouse on the right and the menu on the far left
I doubt there is a problem in my X config because it seems to be chrome related. I don't have any problem with firefox or any other app (tested explorer, phpstorm, desktop right click ...)
I asked for help with feedback option on chrome and waiting for help there too, but maybe someone has already seen this problem with recent chrome versions ?
Thanks for any hint