I have a Xiaomi Mix 4 that can charge fully from 0-100 in about 20 minutes (120w). After installing the app and setting it up I noticed slower charging, but after trying to charge faster and therefore deactivating the app it was still charging slower. Took at least 40 minutes. I uninstalled the app and it is still charging slowly. The module in Magisk was also deactivated.
How can I get my phone to charge at default speed again?