@Jeroen-1s said in Stability problems after 4.4.0 update:
In the first few hours, the phone became very hot and slow, maps were no longer updated and navigation seemed to stop working.
Since big steps have been set concerning the power drain, phones getting so hot they don't function normally anymore are largely a thing of the past. It would be good at such a time to make a screenshot of the battery usage, to be able to see which app is drawing the current. It could as well be a system app or process generating this, while you blame the MRA app. I know it is easy to think the MRA app is the culprit because that is what you are using at that moment, and it is not impossible of course, but it would be good to see proof about that, and a support ticket so they can perhaps do something about it.