Problems with checkbox

Hi there,

First of all, amazing plugin, works almost perfect :).

My users creates posts via gravity form. The posts contains of several different fields, one is a checkbox field with three different values. Upon creating a post, the checkbox field is saved with correct values. But when a user clicks “edit my post” checkboxes are not populated with correct “checks”.

This ONLY happens if a user chooses to check more than ONE box. If the user only checks one box, then it will be populated correctly upon “edit my post”. But if a user checks two or more boxes, they are all empty upon “edit my post”.

https://ww.wp.xz.cn/plugins/gravity-forms-post-updates/