When adding two fields (feature service), one does not show up in Pro

[wayfaringrob]

Can someone help me figure out what's going on here? I have a hosted feature service that I opened up in Pro and added two text fields. I hit save, and both were appearing in the fields list, but only one in the table. I tried refreshing the table, opening it and closing it, but it did not appear. I reopened the fields view, and the second field is not appearing, but when I go to re-add, it appears red as if it's already there and won't let me save. In AGO, the field is visible.

If I remove and re-add, it appears, which is fine in this case, but what gives? Is this expected behavior?