I was in the middle of a POTA pile up, and logged the contact in the screenshot below. For whatever reason, it would not click the Save button. I wound up just taking a screenshot of the contact and manually adding it to the ADI file myself. I worked about 60 other contacts today without issue.
I’m not sure if there was something weird about how I typed it (maybe a trailing space or something???) but there was no user feedback as to what was going on.
FWIW, I hit the Clear button, and then moved on with the next contact as I had a pile up.