Masked UI on Windows
The exactly same masked scrolling list on linux
Is this in player or in editor? If it’s in player, you should file a bug report from Unity: Help->Report a Bug
It’s in the player, I posted it here because I thought there might be a slim chance of it getting seen by someone at Unity with the ability to fix it.
Your best chance is to file a bug report. 
Feel free to PM me the case number directly.