See attached link with a video that explain may problem.
https://we.tl/t-YWpVo00IXk
Refreshed form.
https://conditional-fields-cf7.bdwm.be/form-tester/?hash=de11a1580f4f1d930c6fb0947811f85a
When a submitted a Model, like M210, in “mail2” doesn´t send the information of the group M2-selected.