I’m running the standalone version of Mocha 2020 on Centos 7.x running 3 Titan RTX cards. The remove module creates heavy artifacting when “use GPU” is checked. Without GPU processing, it’s fine. My NVIDIA driver version is 415.27.
Can you send a screenshot of the artifacting and your Mocha Pro Remove settings full screen with your shape layers on? I’d like to see if we have seen this before.