I had 2 double chests that are half invisible. They have been like that all day. Yesterday I could open them as long as I clicked on the invisible part of the chest and now I can’t. It just crashed our game on a realm twice and set us back to the last backup. 
last time I opened them if I clicked to open from the side that was visible it would only show me contents of one chest, clicking the invisible side would show me the entire double chest.