The server passes away for a couple minutes every few hours. It was flagged and should hopefully be resolved in an upcoming update. Not ideal but not much we can do about it at the moment. Here’s the bug report: https://github.com/LemmyNet/lemmy/issues/3342 but it’s related to a couple other tickets as well.

Just to add to Sami’s comment - its really bad at the moment due to the traffic, but should calm down again soon. They can’t release the next update quick enough!