Are all of the listed issues in the field group editor?
The features that I see are all part of ACF Extended Plugins you are using. Any issues with these added features need to be reported to the developer of that plugin. ACF does not supply support for them.
* Issues with repeater fields – when I add the fields inside the repeater, they are picking up a field_id of “acfcloneindex” and then not display correctly on the front end.
I have the same problem when adding a new field inside a group, in a option page.
I don’t have ACF Extended installed.
When I add a new field ONLY using the top button, the field is generated with a key = acfcloneindex and it doesn’t open the field automatically.
When I save the fields, the field is saved outside the group.
If I use the bottom button everything works correctly.