When i try to fill a clay barrel with a clay bucket filled with water, the level of water in the barrel increase but the tank still indicate empty on TOP. When if i log out / log in, the bucket look full but if i try to transfer water in a tank, it doesn't transfer anything and the barrel is empty.

Versions? Also, is this only with clay buckets or do normal ones work?

Its on losts souls modpack version 1.0.4, version 1.3.3b for 1.12.x

Can you answer the second question as well?

Ho sorry, i figured it's not a bug related to ceramics but with the container i was picking the water, it wasn't working correctly and had sync issue between client and server. I close this issue sorry for that.