Hey Steve –

I found the issue but I’m not sure where I need to commit a fix – is there a GitHub anywhere that I can fork? Basically, on line 18 of piklist.js, there are a couple events being attached to all elements with class meta-box-sortable. It appears that this handler conflicts with ACF (maybe it’s doing the same thing?) because when I comment it out, the issues go away. I believe the right way to handle it would be to look for $(‘.meta-box-sortable .piklist-meta-box’).closest(‘.meta-box-sortable’) – that would ensure that the patch is only applied to Piklist metaboxes and hoepfully prevent conflicts with other frameworks. Happy to make the code update if there’s somewhere I can commit to – cheers!

Rory