On average every 2/3 hours, the wallet (also last version) goes out of sync and restart it touches !!Also it continues to give the stake "generated but not accepted mined" ....
What could be wrong

On a set % POS coin, you don't lose anything when you see "generated but not accepted".
The system keeps trying and when you do receive it, ithe amount is a little larger since the
time till paid is longer.
Out of synch - I have had that lately when a block time runs long but it re-sets itself when the block ckears.
If it is an all the time thing you might PM the DEV for suggestions.
Generated but not accepted - Same check with DEV. I have only had 3 of those in 45 days. Again you
are not losing a stake but, I can't help on cause in your case. Usually it is several people fighting for
the same block at the same second and the network choses 1 to receive POS.
Could be your block size it too small or you are unlucky or need more nodes?