I have updated 4 Trio 8500s (that are configured as Zoom Room controllers) w/UC 5.9.3.8724 and each one of them have experienced an identical issue. The Zoom Room systems are Dell Optiplex Micros running Win10 and Zoom v5.0.0.
Shortly after successfully updating and at some random time the Zoom Room profile app drops and the device settings page appears on the display and as a result a Zoom error is generated because the ZR system loses communication w/the controller (Trio).
If you press the back arrow (bottom left corner of display) the ZR app loads and reconnects. I do not yet know if this is a consistent issue or simply a one time thing but it has happened on every Trio that I have updated.
I do not know yet if this occurs w/a Studio X ZR but I believe that it's the UC or possibly Zoom Room profile software.
James