Every time my wallet has tried to stake since the 2nd, it has stopped syncing.
Even when my stakes showed as many as 20 confirms, redownloading the blockchain to try to get it syncing showed those stakes to be orphans.
On the occasion when it would catch up it would stake again then stop syncing once again.
Since nothing has changed with the wallet for almost a full year, I don't understand what would have caused this issue.
I had similar problems with staking big amounts of coins about a year ago, network just ban you after some staking,
may be because my wallet forces the difficulty to sky rocket or something like this.
But then network was strong, after few tries it accepted my stakes.
Now I guess there is a fork and network can't choose the right branch and get consensus.