I was playing offline (always have) leveling my sentinel yesterday evening (March 29th) in standard mode. Ended a little after 11pm central time and started a few (3/4) hours prior. I was level 21 when I logged in for that session and when I finished I was around level 44 because I went straight into monoliths when they became available.
During my session I was testing out my Xbox controller since I normally play mouse and keyboard. I was having issues rebinding keys for the Xbox controller (they would not rebind) and the mouse and keyboard was also not responding in the settings menu so I eventually turned off the controller, exited to character creation, and re-entered the game. I played with mouse and keyboard for the remainder of the session. This controller issue and initial exit occurred within the first hour of my playtime. I was in the “Abandoned Tunnels” (Ruined era) when this occurred.
The remainder of my playtime was uninterrupted after my one time exit to character select. I played in monoliths, organized my storage, and eventually logged off in that chamber you go to after every successful/failed monolith (where you can access the reward chest, stash, vendor, etc.).
When I logged off for the day I exited the game completely.
I returned today, March 30th, at around 6:30pm central time to pick up from where I left. I noticed in character select it said my sentinel was still level 21 and upon loading into the game I realized it was not a visual bug.
All progress that occurred after my initial exit the prior day (due to controller binding issues) had not saved. I logged out immediately to avoid making the issue potentially worse and hopped on reddit/steam page for extra info.
This is everything of significance that has occurred leading to and after the rollback and my report that I can recall.