ACF seems to have problems with https://wordpress.org/plugins/lightbulb-save-and-close/
If you use the update and close button to save and close a group it loses all fields in the group, I can’t think why this would happen as the plugin is pretty simple and seems to work with all other custom post types.
Hi @neonwired
Thank you for submitting this issue.
These conflicts tend to arise when simultaneous database calls are made between the two plugins.
Allow me to forward this issue to Elliot so that this can be fixed.