I do wonder why $> scripts/maint/updateFallbackDirs.py check_existing tells $> WARNING::1AF72E8906E6C49481A791A6F8F84F8DFEBBB2BA not a candidate: changed address/port recently (2017-10-22 07:00:00)
But 1AF72E8906E6C49481A791A6F8F84F8DFEBBB2BA didn't changed it address/port since end of 2016.
What I did is to establish a 2nd Tor relay at the same hardware at 2 different ports in automn last year: D11D11877769B9E617537B4B46BFB92B443DE33D (to verify if the combined bandwidth/weight of both would be equal to the one of the former single relay at the same IP). And I played a little bit with its configuration values.
What comes in addition into my mind is that at every reboot I do run first "certbot" to check for a renewed LetsEncrypt certificate. And shortly (1 or 2 minutes) after it finished both Tor instances are started.