Associated attendee data "lost" when migrating environments due to camelcase [Bug]

[LiviaButtons]

I've migrated my Wordpress site from a staging environment to production, and noticed some issues.

Primarily: All the associations between my attendees is lost.
Comparison dev environment:

Prod environment

The wp_associatedattendees table was not damaged or lost, and in fact I can see all the associations in the prod database:

But the plugin doesn't fetch or find this information anymore. When I try to just encode this again, it "successfully" saves but still won't show the associated attendees.

Cause:
camelcase (not supported by my server).

Code in plugin:

in class-rsvp-admin.php