CF7 ID become different when trying to upgrade from 4.1.2 to 4.2.3

i replaced the old Enfold folder (4.1.2) with the new Enfold folder (4.2.3)

1 major area got messed up.

i have a contact form 7 on the top of the page.
the CF7 get its style from the child theme.

but after the upgrade to 4.2.3
the ID of cf7 changes and the CSS not working because it not finding the ID.

i tried several time and i see that:

if the enfold (parent) folder is version 4.1.2, the ID of the contact form looks like this: wpcf7-f244-o1
after replacing the parent enfold folder to 4.2.3 the id of the contact form changes to this: wpcf7-f244-p10-o1

that is causing the css to no longer find the id of the form. and the style of the form look bad.

this is the first time thing like that happens and i did upgraded many times whan new version went out.

do you know about the issue?

is it possible to keep the ID of the form?

or should i change the ID in my child theme CSS to the new id?
this will probably work. but it will make extra work and the upgrade will not be smooth as usual.

it kind of trouble to do this upgrade this way.

what details can yopu provide me about this issue?

Thanks