I'm having the same problem as @S W. Chests are disappearing or aren't accessible. Some of these chests have signs on them, and when the signs are removed, they appear as the birch plank texture that fill an entire hotbar slot.
This is a new thing- I have a backup from yesterday that doesn't have this issue. It just started this evening.
I can upload a copy of the world file if needed. I'm going to try exporting the world to my android device to see if the issue happens locally, or if it's an issue with the server.
Here is the link to my world files- https://drive.google.com/file/d/1ASaoGpo1W2whWvoomqOiz9xGS4wltCCT/view?usp=sharing