Pictures / Gallery / SDCard

Yes
First install Utilities on your smartphones. And clean the indexation database.
If this solution does not work, open a terminal as simple user (no need to be root) via the developper mode or a ssh connection and
try this :

tracker daemon -k
tracker daemon -s

The clean operation needs “some” time. All depends of the number of pictures to reindex.
On my X10ii for around 13000 pictures it can take 15 minutes. But for a xa2 is more long.