a bed spawnpoint issue

when i right click on my bed it says "spawnpoint set" but if i die i don't spawn where my bed is but i spawn where i first spawned when i created the world (luckily my home is near my natural spawnpoint so i managed to find it) and when i right click again on the bed again it again  says "spawnpoint set" even tho i set the spawnpoint on the exact same bed before and ofcourse the spawnpoint doesn't work and i spawn once again on my natural spawnpoint where i first spawned, its like someone would destroy the bed and put it on its place again and no matter how much times i click on the bed it doesn't work. could you please fix it or is there something i don't know about?  thank you for reading

-Rose/Peanut