I got an error when I tried to share the Glenlivet post but didn't think much about it at the time. Then I kept seeing the same posts at the top of my feed. At first, it didn't stand out, as there is a lot of repeated sharing on the platform. Then I noticed that the timestamps of the posts I saw had stopped on August 26. That's when I noticed that my Following count was zero, down from about 400. Well, that would explain why I saw no new content, but not why I was locked out from posting.
Truth be told, for the past week I haven't really missed Twitter either.