Hi Elliot,
I confirm that’s ok for me with the fix.
Thanks you !
Same here, it seems there is a problem with acf_maybe_get_field
function since 5.7.11 version.
I can upload files passing this argument to my form args :
'uploader' => 'basic'
instead of
'uploader' => 'wp'
So i think the problem came from the WP uploader in front end.