One of the more significant changes in 9.21 / 9.22 was the move to temporary connections - Instead of opening a channel to the controller and closing it when you quit, it’s opened when a command or job is sent, then closed immediately after. This was tested for a decent chunk of time on a variety of hardware without trouble, but a few things popped up after the release that were of the “how the hell did that ever work” variety, hence the 9.22 release. That one has been mostly stable, but there have been a couple performance / throughput issues, which I’ve since found a fix for as well, but will be holding for testing and trying to be thorough before we go through all of this again.
All of the above issues are only present with Serial/USB - if you switch to packet mode, they should stop, and there’s another post with instructions for this here:
If you’re a regular user with complex jobs, would you consider being a beta tester (guinea pig) for the next release (using serial mode) to verify that this issue is actually fixed? My own tests have been good, but I don’t have a huge array of hardware, firmware versions, etc, so we do need wider testing.