I had a similar problem, the keyboard was fine but the mouse was stuck. I deleted and reinstalled the Citrix package and the problem is resolved. As KleinVuur noted, plugging into a different USB port would temporarily resolve the issue. Thank you for the information, much appreciated.
I removed and reinstalled the Citrix package for the second time and its working again. The 5070 I’m using for testing is PCoIP and a Celeron processor if that’s helpful at all. I’m thinking this is just a bug that needs to ultimately be resolved in an update. Anyone else still having issues with this?