My immature XVG balance is disappearing day by day... without any payment.

How its possible? 


YESTEDAY:


TODAY:

Hello guys,

I have mined XVG.
It was all good for 2 weeks, but about 1 week ago I have noticed that the graph at the bottom showed me that my rig go forward to produce the XVG, but the "balance" at top has stopped and has remained at the same value...
The XVG address and server (all settings) was the same as always, not changed.

I have stopped to mine XVG.
Is the problem was corrected?