For what I can see so far, it is closely related to the filters part of the field settings (Filter by Post Types, Filter by Taxonomy, Filters) which specifically hangs for a couple of seconds before loading, even if just a relationship field is present inside the Group.
A specific characteristic of the website I am working on, is the high number of Categories, 309 at the moment. Could this be the real cause of the issue?
Every kind of field that loads those filters seems to add delay up till making the page totally unstable. Two relationships and 4 Post Object are enough to trigger the Chrome script warning.
I really need to find at least a temporary workaround as the site is in production and changing data structure is clearly out of question. It is possible to edit the fields with JS disabled or it MUST be on?
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