Confirming again that CDPR is aware of this issue and working on a fix. Everyone's rank points and levels are correctly stored on the servers, but the displays are not always refreshing properly. While this will keep you from leveling up and receiving rewards, no one has "lost" anything. It may simply take a while for the refresh to happen and rewards to arrive.
However, when you see your correct rank and level reflected, do keep track of whether you received the rewards. There is a separate issue that prevents rewards from appearing. Normally, if you don't get them right away, logging off and back onto the servers will make them appear. Other times it can take ~24 hours for them to process and appear. If it goes on longer than that, send it into CDPR Support: