When they moved this instance to a larger server it somehow messed up the background task workers that pretty much do everything. So there is a huge backlog of jobs to be done, each with different priority, which is why any new post's notifier task is pending, and - as is my understanding - will be until the queue ahead of it gets completed.

The big downside of this is that, right now on friendica.world, none of the local-only communications work. You can post and reply publicly, but you can't post to just your friends or followers, nor are DMs working. The server admin recently commented on one of my posts that it should be caught up this weekend. Hopefully everything will be working correctly after that and our posts will no longer have the hourglass and "Notifier Task Pending" on them.