Definitely not a game-breaking issue AT ALL. Just thought you developers might want to know the little bugs we find. Not sure how to tag this post ngl.
Anyways, here's the bug:
When you open the lockers on the "on-foot" maps, looking for loot, if you are standing right up and in front of the locker when opening it, the materia doesn't get picked up until you take a step back, and go back towards the locker. Definitely a small issue, but one you might consider fixing anyways :)