When the update happened, The version of Jerboa in the app store and fdroid was not compatible with the 0.19 changes as you could not sign in, so I just switched to Eternity (which seemed to handle 0.19 better) instead of looking for a RC version of Jerboa.
Edit: There are no problems with the current version of Jerboa (0.0.55) and Lemmy 0.19.2, just to make things clear.