I know that I'm not an admin or anything, but please join the Community Support Discord - please note that technical support for Minecraft is done by volunteers, so please be patient if you do not receive an answer right away. This isn't exactly a bug because it works for others, so if you join the discord you can give more information and might get the problem solved.
Yes, I know that I'm not a moderator, I understand that, but here's a suggestion: Use a third-party Minecraft region fixer. Note that this isn't monitored by Mojang and be sure to make a backup of the world!