Well guys, after a little bit more testing, i have to change my last statement about battery drain.
It seems that reseting the network configurations didn´t affect the drainage. I could see again in 5G that just minutes with small network use was able to drain 1% per minute (using vanadium and a messenger for less than a minute) was able to drain 2% of almost fully charged device.
This is on P 9 ProXL
Im sorry for the last message. There may be an issue on battery drain on 4/5G