Sorry., I'm a dummy. I added a Row filter condition to my slice so approvals in the app view would only show unapproved records. I had to create a separate slice without the Row filter conditions for email approval.

Anyone experiencing this issue again? I haven't change anything and in testing have only have one quick edit field and nothing else in the email so it's not an email size issue.

It's been a year since the last update on this thread and fix request. Any updates? Pressing the Enter key still submits an update to the form rather than creating a line break.