I have a dev site, that was created by upgrading the live site from 3.10 to 4. x, I am trying to create PB Module. Everytime I save the module all rows and addons are lost. I have disabled and uninstalled the JCE editor since in the past I was told it's JCE when this happened on other sites, and I still have the problem.
I have provided admin access in the hidden area, you can re-create the problem by going to Modules, edit module SP Page Builder - Recent & Popular - Right Column, then add a row and add a module addon then save and you will see the row and addon disappar.
This is only a problem with Modules and everything will save correctly on a page.
Thank you,
Mike