Same happened with me. I passed KYC and became a validator, I had done 700 validations. 2 Weeks back my KYC changed back to tentative. Then, I updated password, email but no luck.

Mind you, I did 2889 validations, as hard as you specified. After a while I got thrown back to provisional check and lost all validations too. I don't even think about the reward anymore, I hope to pass KYC. I don't want to offend any pioneers, but I honestly don't understand what this project actually wants anymore?