BlackFog operates in the background filtering traffic and protecting outbound data on devices. However, on certain devices, notably devices running a modified version of Android called OxygenOS on OnePlus devices users may notice that BlackFog keeps stopping. In order to prevent this it is necessary to edit a number of settings on the device.
Open Settings > Apps > BlackFog > Data Usage and make sure “Background data usage” and “Unrestricted Data Usage” is on as shown below. This will allow BlackFog to continue operating normally without stopping.