It’s about the 2nd or third time (since early 2019 December) that I experience the total loss of my stock Message App. settings (last update to 0.7-o-2019122435222-dev-star2lte).
Not a big deal by the way (only a theme color and 2 or 3 contacts specific notification sounds), but not very nice
On a refurbished Samsung Galaxy S9+ (not from /e/ phone store) that works like a charm.