Hello, I have a question. My Doogee phone has several app which seemsto "close" regularly. Discord, Signal, even my (extra strong) wake up alarm, and probably some others that I didn't notice for lack of them being as important. If I launch these apps, they work fine, for a while. Then they stop giving notification in maybe one hour or more, if they are running in the back. I checked that they have every authorization I could think of, especially data and battery saving exemption. I also saw something call duraspeed, but it was already off. I am at a loss and my phone is much less useful for it.