purchased world said that it isn't purchased

my Minecraft game JUST encountered the biggest bug it EVER encountered here are the things that happened
# I was looking for a block (in the ITEMS     section)and then for some reason I could NOT get my cursor off the Chest item 
# I shut down Minecraft then opened it again

1. that only MADE more bad-stuff happened (it made it so that I needed to "purchase" my Minecraft world)
   # I shut down Minecraft then restarted my Switch and it still did not work