Hi, i am having the exact same issue, but only in Chrome and IE/Edge, it works fine in Firefox. I have multiple sites with Gutenberg and ACF wysiwyg editor fields, and the problem is present on all of the sites with WP 5.0.3
My clients cant edit links in the wysiwyg fields when the popup link editor just blinks like crazy when you hover over the buttons in the popup.
Has anyone found a fix to this problem?
