Hello!
Erasing the eeprom data switches off logging before erase which is normal; however logging stays deactivated after the erase. People try to pay attention and switch it on manually but when you happen to do it and you try to map for a day just to realise that logging is off... it ain't no pretty sight at the end of the day.
Please restore logging state after erase. Or warn the user. Or set it on by force. Whatever. Protect world peace.
Thanks a million in a name of lots of people who accidentally forgot to switch it on and have no indicator (holux m1000-c little black box).