Have the same problem. Or nearly the same.. don’t know. Nightly build of ACF, WordPress .6 and I can’t sometimes update some fields. But it’s very strange. I configured an option site with many repeaters, repeaters IN repeaters and some normal input fields.
So.. first I had problems with some fields (in the middle of all content). After some variable-updates (no shopware installed..) it works fine. But now one of the last input fields doesn’t update. I updated the variable-names, deleted the field … nothing works.
Now I added a test-field and this one works! … it’s so strange.
greets
