Checkbox Value correctly sent via email but not stored in post db

Hi, thanks for this fantastic plugin.

I need to have a cf7 form to let users choose between all website tags. I’ve tried with static and with dinamic values but the following issue is the same.

it works fine with select (register in db all tags selected):

CF7 form
[select menu-25 multiple]

Post my CF7 – Post taxonomy :
Tag menu-25[select]

But doesn’t work with checkbox (no tags registered in dB):

CF7 form
[checkbox checkbox-52 use_label_element “test” “test2” “test3”]

Post my CF7 – Post Taxonomy :
Tag checkbox-52[checkbox]

I’m working on local environement with latest versions of all plugins and wordpress version.

I confirm that when cf7 send email, i can see all tags i’ve chose.

Do you have any idea about this issue? thanks.