Because of many customer's requests, the firmware of the midi-clock-shifter was changed.
It used to reset "the shift" to zero, when the masterclock was restarted.
Most customers wanted, that "the shift" will be remembered and done again, when the masterclock is restarted.
And that's how it works now.
(But those, who liked it the old way, do not have to be afraid: if you hold one of the buttons while powering up, the midi-clock-shifter starts in "classic-mode" and resets "the shift" to zero, every time the masterclock is restarted.)