Black / greyed out screen on connect

Hello,

With a recent change to ScreenConnect, now some of our unmanned units are stuck with a black screen -- we can fix it by sending a very specific command to the machine, but this just started happening. Doesn't seem to matter how old or new the unit is, it's happening with 5 year old units and ones that went into the field last week, and it seems to be happening more and more frequently.

This seems like a problem -- how can this be resolved?