It looks like, the intended changes (FormHandler L56-L68, see below) to the attributes of a form with conditions will not be applied. Therefore, neither the "cff" class nor the "data-cff-previous" attribute is added to a form with conditions. For this reason, conditions using data of previous mp_forms steps will not work, because the JavaScript cannot extract previous formData from "data-cff-previous" attribute.
aschempp
commented
1 year ago
It looks like, the intended changes (FormHandler L56-L68, see below) to the attributes of a form with conditions will not be applied. Therefore, neither the "cff" class nor the "data-cff-previous" attribute is added to a form with conditions. For this reason, conditions using data of previous mp_forms steps will not work, because the JavaScript cannot extract previous formData from "data-cff-previous" attribute.
https://github.com/terminal42/contao-conditionalformfields/blob/714e7e86a34a3f40659d6b0597dce40ce6bf7ea7/src/FormHandler.php#L56-L68
PHP: 7.4.30 Contao: 4.13.14 cff: 3.0.7 mp_forms: 4.4.0