Dank Null Version: 1.7.9
p455w0rds Lib Version: 2.3.161
Forge Version: 14.23.5.2847

Steps To Reproduce:

1. Have granite In dank null
2. Use Silk Touch on Tool
3. Mined stone will be collected as granite instead of stone.
4. Removing granite from null and only having stone will collect stone instead. ( can still have granite in inventory just not in null)
5. With stone in Null, then adding granite, all future stone gets collected again as granite.

Playing On 1.81A release of Enigmatica Expert 2

Was this tested on Single Player or Server (or Both)? Single

Was this tested with just Dank Null installed, if not what is the minimal set of mods to cause the issue?

I believe this is an intended feature, do you have oredict on in the dank/null? When oredict is on for a specific stack, any items picked up that match the oredict( in this case, probably "stone") gets autoconverted to the one that was in there first, in this case probably granite. This might not be true, but this happened to me with turning cobble into smooth stone.