I think the longest I've seen for an automatic recovery to full sync is about two-and-a-half months. Partial recovery can be 2-3 days, and some rise in steps over time.
Kindness isn't going to cure the world of all its awfulness but it's a good place to begin. Daisy Ridley.
My broadband basic info/help site - www.robertos.me.uk.
Domains, site and mail hosting - Tsohost
Connection - AAISP Home::1 80/20. Sync 63790/13596Kbps @ 600m. BQMs - IPv4