WARNING:
If you were selecting a repeater row using the javascript/jQuery $('input[name=acf\\[field_name\\][0][[sub_field_name\\])
that has now changed to $('input[name=acf\\[field_name\\][row-0][[sub_field_name\\])
with the version 5.8.0 update.
This will break anything relying on the previous field id.