It seems this issue also caused many realms to roll back almost and lose progress. After around 6 hours of progress I had logged off then back on to find it was back to the same state as earlier today. I had added onto another ticket this issue as our realm backs up only to 2:30ish CST.
Has happeed to a realm of ours as well, recently played for a 6ish hour period (logged off about 5:30 CST) then rejoined around 6:30 CST and the realm had been set back to the same state as this morning.
This happened to our realm too I was on there for roughly 6 hours which has all now been lost. Have been commenting the same issue on all tickets similar to this. Seems like there's an issue with backup saves at the moment as well, not sure if they're connected.