#Recently I am playing a modpack with about 80 mods including NuclearCraft. But I noticed there is a lot of strange liquid that says it belongs to NuclearCraft. When I get it from the jei, it gave me a forge:bucketfilled item with 2 nbt tags. I right clicked to pour the liquid, a purple-black liquid appeared. At first, I think it just missed its texture. But when I exited and reentered the world, the liquid all disappeared! And if pour the liquid in a server with modpack's mods, it crashed with a tons of NullPointerException.
I think there is something wrong with the integration with NC and other mods such as TConstruct. NC seems to generate a lot of "virtual liquid" as the result of molten other mod's metal. And those liquid are not properly registered.
Sorry for my poor English.

Some example of NC's strange liquid:

When liquid is poured...

But it disappeared after reentering

TConstruct's molten metal works well, and they won't disappeared...

The crash report of the unfortunate server. And the mods list also printed in this report.
https://paste.ubuntu.com/p/HhGSfTq5zf/

Hey there! The issue is that you do not have the fluid block registration enabled in the NC config - it is disabled by default as they can take up a large amount of block IDs. If you want the fluids in-world, then you just have to enable this option :)