Newsletter recipient selection is not saved when returning to newsletter edit screen

1. What went wrong? After selecting recipients that will receive a newsletter, when clicking on the "Edit" button, the admin has to select recipients again. 2. What did you expect to happen? As an admin, I expect to be able to save the recipients that I edited when returning to edit my newsletter. 3. Where did you found this bug (which site)? On https://staging.decidim.codegram.com/ (0.22.0.dev) Thanks!