I’m only able to rearrange one or two apps at a time before my changes stop updating.
After that, I can still move the apps around in the phone app, but the new positions don’t transfer to the Tidbyt and will revert back to the previous order on the phone at some point, too.
My workaround has been to force quit the phone app, and relaunch it. Then I get one or two fresh tries at moving apps again.