Adding Element to Flip-Box seems broken

Hey guys

when i want to add a element to the flip-box plugin (f.e. Text or Picture), it's added not in the Pluginfield, but under the flip-box plugin in this row.
Can you please check that? :)
I would like to use this plugin in one of my projects.

Greets, Sebastian.

Replies are visible only to logged in members with an active subscription.