I started a level on my pc, I put my computer in sleep mode, then I open the game on mobile: I am not in that level, I am on the world map and judging the minimap I can tell it's like there was a roll back of a few hours. I switch off my phone, I switch on my computer: I'm still in the level, I refresh the page: I'm still in the level, I leave the level: there is no rollback. So as weird as it sounds, it's like the game is using 2 different servers for my pc and my mobile, and the mobile one can take a while to sync with the other server. Surely this isn't how that problem happened but I can't explain how otherwise it could have happened. I definitely played the game on the same account and bemined.com for both, and after I left the level on pc and opened the game on mobile the "roll back" wasn't there anymore.