The tracking task is Phab:T135239 which currently lists:
-
T135197: Echo cross-wiki messages fail to load (Access to the remote domain was denied) -
T135252: Cross-wiki notifications are loading without any result -
T135250: Some cross-wiki notifications are blank in the flyout, but only at some wikis -
T135246: Bugs on notifications on wikimediafoundation wiki and office wiki, possibly due to last Notifications release - T121930: Cross-wiki mark as read doesn't work
(Some of these are probably duplicates, or are caused by the same underlying issue. Work is ongoing to investigate and resolve them.)