The same for me happend
What is it ?

Hey guys. What you're seeing there is orphan stakes. Orphans happen when your wallet competes with someone else's for the stake but your loses out.
6 times in a row? Before that, there were 2-3 good in a row. And after restarting the wallet starts to throw errors and does not start. After reinstallation, it can not synchronize very long. 3-4 times have to do re-synchronization. And this is the 2nd time in 2 weeks.