Invisble Chests

Hello, today I entered to my minecraft world and the chest are invisble. I search for a solution, but the last version reported with this bug it's 1.10.2 and in multiplayer, so I'm making this new report.

The last things i did, are back from the end and do a copy of the world. Idk if something go wrong there.

Also i have a world with a datapcack, and installed a minecraft 1.12.2 mods in the same launcher

Thanks for the help