In my test environment, have 3010, 3020 and 3040 units.  Running thinOS 8.5_009 and/or 8.6_024.  Since i updated to Windows 10 v1903, when connecting via RDP i get black boxes around my windows cursor.  This only happens when i have dual monitors attached.  

Also have extremely noticeable lag time after upgrade.  When disconnecting, i have black windows for a good 15 seconds until connection is terminated.

Any help would be appreciated..