Chunk reloading problem. All chests/beds/signs/shulkers invisible and all items inside them are deleted

I noticed this bug early on in my hardcore world where randomly I would come back to my trader hall and half the signs would be invisible. Then while I was building something I had all my shulkers/bed/and collection chests placed down. I used my elytra to fly out some 50-100 chunks to get more wood for the chests. When I returned to the build, every chest/bed/shulker in the chunk was invisible. I could still interact with them but they were all entirely empty. I lost all my materials, equipment, supplies, etc. I could place fresh blocks next to the chests/shulkers and they would turn visible; however, they were still completely empty. In the included screenshots, one of them has visible shulkers. This is because I placed a block next to them which caused them to become visible again;, however, they are still entirely empty.