Note that Jerboa 0.50 which is still the latest in the Play Store is broken with Lemmy 0.19. The newly released 0.53 should work but it's not on the stores yet.
Suggestion:
Check that the compatible Jerboa version is on the Play Store before upgrading Lemmy. That way non-technical users like my wife won't see breakage. Or alternatively upgrade several days after the official Lemmy release.