I had put this game down for a few months, came back to a game update, but all my mods were up to date so I didn't think about it. I load up my save, and all of my merged chests with the factory texture had been deleted along with their contents. Is there an easy fix for this? Did I do something to cause it? I'm sorry if this is a redundant question, I really have no idea what I'm doing.

I will add that all of the removed chests are 2x2 or bigger. The largest being 41x2, the two smallest ones being 6x2 and 2x6. And that have a dimension of 1xN or Nx1 are still around.

Please ignore this, I had assumed from various threads that because I used the default settings that all of my chests would be supported. I poked around in the migration json and found my specific sizes weren't included. Added them and all is fine now.