please tell us which version you have.
go in settings than system
S/W Version: ?
maybe you habe the old version. I had this problem too but after the update it doest happen
I am using the latest firmware.
Here is my system details:
Firmware Version: 1.2.28
MYTVOnline Version: 1.9.24
It's very odd that your formuler z7+ unit dosen't have this problem anymore after the update and mine still has it!