Just updated to FW 540 & RT 2.5.5 Stable. Two problems so far:
Back to back no longer works. Fan Speed window now shows F0 instead of Cn. Used to be when fan speed was lowered to zero roaster would go back into preheat. Now it just goes to “Off”.
If you bring up Settings now during a roast and make some changes, when you exit back (with “cancel”) the graph is a mess. The temperature plot has jumped many degrees and it is now showing times from the previous roast, not the current one. Had to exit RT and run on manual.