There are several channels that my server suddenly stopped receiving info from ~11 months ago. Off the top of my head, tilvids, neattube and makertube. If I go to any of those channels from my instance, the last video is 11 months ago. If I go to the remote instance, they all appear.
Further, if I go to the remote instance, click the comment box and then the « remote interact », that video (and ONLY that video) suddenly appears on my local instance.