On my second mavic mini after the first was replaced, noticing that the flight logs are not being populated and are not being updated automatically as set. Seems this problem has been going on since at least 2018. Tried on two different Android devices with same result.
Also how do you delete a device you no longer have? Referring to the unit that was replaced after one flight attempt.

Hi there, if you would like to delete the records of the previous drone, please delete it flight record one by one, then sync again to the server. Please note once you delete and sync it, it will be recovered.
For the synchronization issue, did you close Auto-sync Flight Records and enable again?