@nicholas, although you are technically right about the description of what a 429 error should mean, shouting "THIS IS NOT A BUG" is incorrect.
My guess is the people that are following and upvoting this thread (me included) are the ones that have this issue on the first attempt of the day. Seen by the many upvotes this issue has, I don't think it's realistic to think that so many people are "DDOS'ing their own realm" I don't think a lot of people enjoy logging in and out every second.
And even then 429 should only prevent failed login connections (hacking attempts?). I'm paying for this server, so I should be able to log in and out whenever I want. Of course there should be protection for 100 logins in one minute, etc. But not for normal use of logging in and out, let's say once every minute (as long as it's a successful login attempt).
I got this error 3 days in a row around 18:00 (CET) one time it was fixed after about 40 minutes, the next in 20 minutes, and the day after that it connected at my second attempt, 2 minutes later.
The first day my Minecraft launcher + computer was turned on the entire day on the realms screen, so I thought that might have been the issue. But the other 2 days my computer was turned off and I had the same issue.
Didn't experience the issue since 3 days now, so I'm pretty sure there is something wrong on the server side, and it's effecting a lot of people, and because we're paying for this, they should make sure this doesn't happen (I've never had this issue with netflix/disney etc, which is the same price) And i just started using realms since 2 weeks ago.
I have had this same issue manifest in a few ways:
On my farm, all of a single type of animal will freeze. You will still HEAR them, and see grass get eaten (where no animal is). You cannot interact.
-This has seemed to cause my animals to disappear and load outside my farm as well and animals to die because they fall or get stuck in something (bushes)
*I have found the only way to stop this is to save and quite and reload.
-When I am in caves, I will HEAR mobs, but not SEE them. They will mob up and attack me but I cannot retaliate. As I speed run OUT of the cave, I will find a collection of their 'soulless bodies' standing around frozen. THIS is most aggravating as I can't even retaliate.
same problem in 1.16.1
but I found that onClick event can be triggered when I set is_showing_menu = true
Still not working