Yes, 12.1.1 should be fully compatible with 12.1.0 and no, sync issues were not Qt-only, it's a common issue in 12.1.0 which wasn't discovered in testnet due to relatively small number of masternodes there (~100). 12.1.1 also manages so called service connections in a better way (the reason we missed this one is basically the same).
With that being said, update is recommended for everyone

Thank you for the fast feedback.

Can anyone tell me what is wrong with my MasterNode Dash-Wallet when
 start-missing

simple does not work?
No matter what I tried a week ago it always said 0 of 0 successfull started and the masternode status said not started.

I use the dash client zip file for windows (not the installer) copied all the content in one single costum named folder and I worked with the client.config start method before. ( For some reason they blocked that start method now. :/)

While some got double and tripple the usual pay outs I lost over a week payout by starting them with
start-alias

Not complaining I am glad I could start it at the end but I just want to know the issue for the next time so I can fix that. If the Dash value rises a payment drop out can become a significant lose in the future.

Are you using IPv6?  I know it seems absurd, but Dash version 12.1 broke the IPv6 functionality it inherited from Bitcoin.

Hey icebreaker...how's it going =)

Did you ever get around to de-anonymizing that PrivateSend transaction from last year?

 

Very entertaining thread you have there. Looking forward to your "trolling at the protocol level".
 
Even your Monero buddies are warning you that the XMR vs DASH meme is backfiring, but you are really  obsessed with it.

Wow, not only did you bump my video, but I get two posts for the price of one! You really are a team player, iCEY! You can feel free to delete your post, now... 

Haha, so cruel