Problem using a frontend edition form, with custom taxonomies

[Dj4y]

What Version Of Caldera Forms, WordPress and PHP Are You Using?
Caldera forms : 1.5.8.2 - Wordpress : 4.9.1 - PHP : 7.1.7
Does Your Issue Persist When You Disable All Other Plugins and Switch To The Default Theme?
What Is The Unexpected Behaviour?
It seems that cutom taxonomies in checkboxes or radio buttons doesn't work on frontend edition : values are not kept, nothing is checked. (it works with a manual list, but not with an autopopulated list of custom taxonomies)
What PHP Errors Have You Logged While Reproducing This Bug?
none
What JavaScript Errors Have You Seen While Reproducing This Bug?
none

[Dj4y]

I understood where is the problem : when i use save as post type, all datas which are assigned are no longer into the post meta. So that's why i can't retrieve my checkboxes with the pre-edition configuration.
I'm searching a solution to keep datas into post meta ( it's the simpliest way i think).
Is there anybody who could help me to do that ?