It started early this year, suddenly lots of orphanes at times 9 out of 10 rewards.
After try and error I was forced to block all incoming connections.
-system clock gets synced every 30 min.
-only POS coin that has this problem.
Anyone else got this problem ?
I've only seen it when my clock is out of wack. And it was generally 3-4 times more stakes then normal. But all orphans.
It's very weird that it suddenly started to happen after running for years without any problems.
Also using a different PC gave the same problems.
Only sollution seems to be to block incoming connections but then it seems I pick up a lot less rewards as I normally would.

has anything changed in your network?
As far as I know nothing.
In debug I find lots of these :
4/12/2018
00:54:45 received block 1f165f37be0ec9f81bed
4/12/2018 00:54:45 ERROR: CheckBlock() : block timestamp too far in the future
4/12/2018 00:54:45 ERROR: ProcessBlock() : CheckBlock FAILED
Also when I start up the wallet it says synced but some 10 min later it's 1 or 2 blocks behind then it finally is synced.