This still happen in 1.21.123 Hotfix
Even i haved cloud space… Only Minecraft is getting trouble that i do not have even i reset my whole system
Same thing happen to me!! It basically first say there is no cloud space and after that i reset my xbox and then i try to sync worlds back everything just gone! They mean to go Xbox Cloud…
And there is still 8GB amount of files in cloud but nothing of them shows in worlds list in Minecraft.
I have exactly same issue!! Except i do not have realm