@ansch190 : I had similar problems on Xperia 10 two times (weeks/months ago).
It occured after installing some Android apps. It was a serious damage of the system. Deinstalling apps, switching off Android support and even deinstalling Aliendalvik didn’t help anymore.
I had to ‘factory reset’ the phone and to new install all updates. But now everything works like a charm.
All this bllsht came from Android apps, including forcing the phone to send excessive amount of data over the network. I saw this on the LEDs of my router and internet access frrom other computer getting slow. Had also other malfunctions like you wrote
This also persisted after deinstalling Android apps and even Aliendalvik itself. For me I consider as proven that some Android apps via Aliendalvik have the potential to permanently damage the SFOS system.
So I suggest to factory reset your device.