The "deja vu" League

I logged in today and the last 20 minutes of my game play, quests, zones, passives etc was all gone. For a while I was questioning my sanity.
If only progress could be stored locally (encrypted) so when you reconnect the game can reconcile.
What's the longest period of play you've lost, that's my record so far?

I have played PoE for almost 13 years and have never had a rollback or lost progress as you term it.
I play on the California gateway for reference.

I've lost two labs and a bunch of maps this league, because of disconnects, but loot in inventory & XP were still there.