Recipients are not shown when creating / editing mailings
The issue from Jira describes behavior I am noticing on Joomla 3.8.12, Civi 5.5.1: https://issues.civicrm.org/jira/browse/CRM-21780
Recipient groups are not shown in the input field when they are added to a mailing. The number of recipients updates to the right of the field but the field itself remains blank. The mailing is sent as expected, but there is no visual identification of which groups it is intended to be sent to.
How it should work: The names of recipients should be shown, along with an x to remove them from the list.