Sure ...
Situation is:
- you have installed any of the older versions running on so-called API 29 (so anything before 4.5.0)
- then you update on any new version 4.5.0+
- system grants a special exception to this "update"! to access app old data in the root of the external memory. I was not able to find out if there is any time limit, but I think it isn't. This exception is not granted for new installs. So in case, you re-install the app, it lost this kind of access.
- question is, if any future update of the app does not remove this exception as well, I hope it doesn't. Anyway, because it is not described correctly on Google dev sites, we rather push users to transfer data into private dir as soon as possible.
Is my explanation clear?
Btw. did you notice that the latest version allows moving "mapsVector" into SD card/private directory?