I am having this same issue on v220.127.116.11.
I have a repeater field composed just of text field rows that is in a group assigned to a page template called Gallery and it will only allow me to delete rows until there is at least one row remaining with at least one character. It’s not a required field, so it seems odd that it’s enforcing what looks like a minimum content requirement.
The final row always reappears with the last entered content on both the front and back end if I try to delete either the content, the row or both – see attached pictures.
This is really unusual to me – I’ve been using ACF for years every day and have never seen this before.
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