Paintings Disappear and other items

My husband and I are using his world, BlkChallenger, and we both create paintings and everyday they disappear!  I also had an anvil disappear just after using it.  The Anvil disappeared a few days ago, but the paintings seem to go missing a few times a day.  We are using Bedrock on Windows 10.

 

Is there a way we can get the paintings to stayÉ

 

Amanda Beatty