Hey Patricia, Rikard and John,
for our website, we seem to be experiencing the exact same issue. We are currently running Enfold 4.2 and whenever I attempt to edit the Testimonials, they reset.
On a perhaps irrelevant note; entire sections sometimes disappear when you edit unrelated content and update the site, usually the sections underneath. This annoyingly makes the theme practically unworkable.
Hope to hear from you soon!