I edited my map on 5/27/2020 around 10AM and I am trying to access it now at 4:10 PM and it reverted back to an original version. I believed everything was autosaved
I've been having the same problem. I'll make a change to a slide and when i check in later the change is no longer on the slide although the previous material is still there.
I have the same issue every time you change something it will not be saved. I have to create a complete new strat to make the adjustemts stick.
Same issue as the above posters