In the most recent FUI releases, I encounter the following issue:

• You have a crud on a model with many fields
• The first field say is name, and for a given record it is empty
• You go to "Edit" for that record in the Crud, and the edit modal opens
• You enter something in the first field
• You scroll down, and click "Save"
• It won't save but jump back the focus to that first field. Scrolling down again and clicking save will then save correctly.

See screen recording: