I have been noticing that my minecarts with hoppers in just disappear randomly. This happens when I either go onto the world or waited afk overnight/spawn them back in from being away from them. I use them for collection but now it's a couple of times a day I have to keep replacing them. I can't just use the one I had. As it just vanishes and I have to make a new hopper minecart for each collection system from scratch. It's starting to get annoying having to keep using my iron to replace them.