I need help with a bug.

I logged into the server, and went on easy. The glass panes, cobble walls, and iron bars were not connecting to each other, although it would not let me walk in between them, like normal.
The doors were glitching, having the top and bottom texture not positioned correctly.
All the chests said they were locked, even though they were on my claimed land, and placed by me.

I went on to the skyblock server, thinking that maybe it would be working.
The chests were accessible, but the textures were still broken, along with connected redstone lines.

I have a suspicion that this is caused by whatever they did recently that had the server shut down for a day, and it is making the easy survival server unplayable.

 

@castlequeen2004 and I decided that restarting with version 1.12.2 might be the fix we need--- we shall see!