Any tile in the first slot is expected, that is the lead tile (ie furthest from the players) The third tile is the order is labelled as the Rear tile (the tile that players move on to at the start of the game).
Testing on android 12 OS version of app, I am constantly seeing 1A or 1B showing up as rear tile as intended whenever I start a new race. But doube-check and you may want to see if a bug submission is possible (I know they have a bug submission form for RtDT, but I'm unsure for the basic Restoration companion app). Make sure you note what device you are using if you do.
Testing on android 12 OS version of app, I am constantly seeing 1A or 1B showing up as rear tile as intended whenever I start a new race. But doube-check and you may want to see if a bug submission is possible (I know they have a bug submission form for RtDT, but I'm unsure for the basic Restoration companion app). Make sure you note what device you are using if you do.