Sand stuck in material reducer

The material reducer glitched out when I put sand in it twice and first time it couldn't be removed so I expected when I would close it it would give me the sand back but it didn't, it just turned red and didn't allow me to get it back so I reported it and I had to check my version and when I entered my world to show you a picture it stopped and I now put in sand and took out 3 oxygen and it glitched out again!