Running Windows 10 Pro Version 1909 build 18363.657 on Parallels 15.1.2 build 47123 on MBP running Catalina 10.15.3. Added a portable external USB monitor- ASUS MB169B+. Now periodically a second mouse pointer appears on my MBP screen (never on the ASUS). It disappears if I unplug the ASUS...
