I am doing the 'Don't fix if it isn't broken' approach.
I saw only issues here and in the slack channel with the 'new' 0.12.1.5 wallet while mine on the 0.12.20 are working as before.
and whole sequal is also weird...
i mean new wallet has core 12.1.5 and the old one has 12.2

to my knowledge 12.2 is newer than 12.1.5 ?? or am i wrong
12.1.5 is the most recently released version. Why it has a lower version than what was already out I have no idea. The shoddy release pretty much killed this coin...which is unfortunate. Yeah the old wallet works, and you still get rewards, but what's the point if you can't liquidate them when you need/want to?