I bought a realm about 4 days ago now and within the first 3 hours we realized that it was crashing a lot. After the first crash we joined back and it was fine. The second time it crashed we were sent back to 30 minutes before that. I've noticed that the realm backups every 30 minutes. It will let us play for around an hour and then crash sending us back 30 min and I've tried everything to fix this. I've downloaded a world from single-player in hope that it would work I've reset three worlds now and reset my computer, logged out of Mojang and log back in. I've even go so far as to delete Minecraft and re-install it twice. Nothing I do seems to work and I want an explanation. The only other place I've heard of this happening is by another user reporting it here back in November of 2019. And Mojang did respond saying they were already looking into it but now its happening again for 1.17. I don't know if it is because it is just a new update or if its just a bug but there needs to be a way to fix it or update it to where it will not do that. The report for the same problem back in 19 is here: https://bugs.mojang.com/browse/REALMS-2281?attachmentViewMode=list