P: Can’t press “update” button for legacy settings

This is a weird one, I've never seen it before or had this before.  On my iPad Pro (10.5") the "update" button that shows up when you load an old RAW image to update from a legacy profile can't be pressed.  It's not disabled, or doesn't look like it, but nothing happens when I touch it.  No reaction, no message, nothing.  

This is in a set of images I've been working with before, and never seen this before.  The only difference now is I'm on a mini vacation (same country) and on crappier wifi (but just crappy, not disabled or anything).  

 

The images aren't local, but load fine when I start the app, and the rest of it (editing other images, moving between the 'legacy' set of images, that sort of thing, all work just fine.

 

Update - changing from wifi to hotspot doesn't change anything, nor did rebooting the ipad, or deleting and reinstalling the app.  The update button on the same photos on the iPhone works just fine.