I doubt there’s plan to reset progress from the beta. I guess in the worst case, some section might have challenge or two added, but that’d be just individual steps, not the whole certification, or section.
New version of Responsive Web Design is also available from the curriculum page, but as beta it’s at the end of list.
I can’t be sure that this will be the case this time, but in the past when a new version is in beta testing progress as a beta tester has NOT been preserved when the changes go live. Given the instability of a beta release, you should not consider anything to be guaranteed. If you’re not comfortable with that, then you should probably focus your energy on the stable curriculum.