Open up one of your obsevations that has obscured geoprivacy.
Tap on map, then tap on copy icon to copy coordinates.
Paste coordinates. The coordinates that are pasted are the obsevation's public coordinates, even though you have access to the true coordinates of the observation.
From https://forum.inaturalist.org/t/android-app-copies-incorrect-coordinates-from-observation/39352/ I can replicate.
Version 1.28.10 (563)