Calling delete on an offline region doesn't actually delete it

[Pxddy]

Platform: Android
Mapbox SDK version: Android: 9.2.0 and i guess 9.1.0 is affected too

Steps to trigger behavior

1. Keep automatic database packing enabled
2. Create an offline region with raster tiles
3. Delete the region by calling the delete method on it

Expected behavior

This should delete the region and all tiles should be removed. Since the automatic database packing is enabled by default and we haven't changed this setting, the used disc space should be freed.

Actual behavior

The region isn't removed completely. Also the disc space isn't freed.
It is even possible to recreate the region without re-downloading the tiles.

I also noticed after some testing that calling clearAmbientCache() after deleting a region finally removes all tiles. So I guess this issue is caused by this change: mapbox/mapbox-gl-native#15622

Best regards
Pxddy

[stale]

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