Hi Elliot
I saw the ACF GitHUb change you made for the above issue:
https://github.com/elliotcondon/acf/commit/268b02b45110ba27d1da8cdef296d67d5d96a0b2
I’ve tested the fix and can confirm that ACF default field names with an “_” work for single fields, repeater fields, and repeater sub fields.
Thanks for dealing with this so quickly.
Cheers
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