since some days - probably since the last Locus update - I have the problem with Locus and the location settings.
I normally switch off GPS because I do not want to be tracked by Google and others.
But now the Android Location - settings - screen always appears after some time (up to about one minute) of using Locus. It is not possible to work with Locus unless I allow the GPS location service: if I chose the Locus screen - with or without disabling the settings screen before - , after a short time the setting screen appears again and so puts away the Locus screen.
My smartphone: Samsung S8, Android Pie (same behaviour with Samsung Oreo)
With kind regards H.Hoffmann