fitbit + the last time I check my alarm clock before doozing off. usually both are 10min-ish appart somehow even if i fall asleep at 11pm, the 6am slot does no

fitbit + the last time I check my alarm clock before doozing off. usually both are 10min-ish appart somehow even if i fall asleep at 11pm, the 6am slot does not move (force of the habit?) - so maybe something to check?