Rikard, thank you for the observation.
It seems that the plugin was indeed the source of chaos (the mobile menu was off as well).
Your help is much appreciated, have a good day!
I am experiencing the same issue: fullscreen and fullwidth easy slider both not working.
I have updated the WP install to the latest version 5.0.3, and using the FTP, to the latest theme version 4.5.2.
Please advise on what else I could do to sort it out.
Considering this case :
is it a bug or not that the featured image is not in fact being displayed on the individual post page ?
Also found this https://codecanyon.net/item/enfold-nested-shortcodes/19305825. Seems to be able to accomplish pretty much the same functionality. Has anyone tested it ?