When editing the prefered pictures in a taxon page (Curation -> Edit Photos), I click on the Next button and fall on an empty page, where I remain blocked because there is no Prev button. I can only exit, either saving the changes or discarding the changes.
This is more annoying if there are many pages before reaching the end: I can’t guess when I will be blocked. And trying again takes much time, if there are many Photos.
If getting a last empty page cannot be avoided (the set of photos may change at any time, depending on ID changes), then a Prev button is needed, at least.
I got this issue with a few taxon pages, for instance Senna pumilio: