Some months ago, I had UTD issues with Element X too. My hs has been up for some years, and the devs claimed they had done a lot to fix UTDs.
I was about to bring the server down, but as a last resort decided to log out all but one Element web session which was able to decrypt the messages and try resetting the key backup. Haven’t had any UTD issues since then.
Maybe worth a try.









Not saying bikes aren’t the most dangerous, but comparing against the distance skews this. A plane trip is usually quite a bit longer than any other.
Not sure how else to measure it though, maybe against number of trips traveled?