If you load a savegame that was created with game-version 0.16.39 to game version 0.16.41 rail signals that are circuit-controlled are not converted properly.
the circuit condition to close the the signal is ignored by the train.
normal train signal function is maintained - the trains won't crash.
problem does not occur when train signals are placed in version .41.
i created a small savegame in version .39.
if you load it to version .41 you can experience the bug.
(the trains should stop at the train signal that is circuit controlled.)
Savegame: https://drive.google.com/open?id=1R2cTT ... j6ynh14YXC