Since the clock change on the 29th the RD iOS app is not redirecting the correct time on the server. I can see this was fixed over summer in the macOS RD app, but it’s still in an issue on iOS.
So we are getting the same issue with timezone issues during RD connections. In our instance this is using the newest AVD application component in ThinOS which is Dell's Wyse Thin Client OS.
This impacts any system with the newest update, old update has no issues.
We are in EST and observe Daylight Savings Time in Indiana, so as a workaround I just changed the timezone from UCT-5 America/Indiana to UTC-5 America/Bogota. This is a city in South America that does not observe DST, but has the time we currently have.
You should all be able to do this as a workaround for right now, just change the system timezone from one that uses DST to one that is the current time for your area without DST.