Was noticing this same behavior on a couple field groups… I think in my case I narrowed the problem to the google map field.
Caught this error from the Chrome Console:
TypeError: Cannot read property ‘Geocoder’ of undefined
In instances where the tabs fail, the Google Map field default map is failing to render. When I remove the map field, the tabs render.
Am testing to see if the maps field is failing because of another plugin…
JW
