I don't know if its a issue but Lootr chests always have new loot when you walk a bit away.
maybe an option would be good to set whether a chest can be looted several times by the same player or not.

Forge version: 38.0.17
Lootr: 0.0.11.30 (newest one)

Are the chests changing colour as well?

~~More questions: ~~

• Does this happen on a server or in single-player?
• Do the colours of chests also revert?
• Does this happen with 0.0.11.31?

The same happens to me when going to the nether, the chests reset, they return to their yellow version. with 0.0.11.31 on a server.

Thanks for the confirmation and the replication steps. It looks like some data isn't being saved properly somewhere.

Can confirm this happens simply when relogging in single-player.