On a Direwolf20 Server.

Add item to Dank Null, Once the item hits a stack and any more items are added to it, it will completely delete the item inside upon opening up the Dank null interface.

I believe that the direwolf20 pack is using an outdated version of DankNull and that the bug was fixed in a newer release. Check if the mod is outdated and if it is, update to the newest release. This should fix the problem.

What version are you currently using? As far as I know, the issue is supposed to be fixed in the newer versions. If you tell me the version, I will try to replicate the problem you're having.

It is a older version but I tried to update it and it still caused this issue. Maybe just mine because it's a slightly modified version of Direwolf20.

My players have reported this issue in every version we've used except 1.4.43.

try dis plox and report back

I tested both in an environment with just /dank/null and p455w0rdlib, as well as just plugging the most recent update into my modpack, and both seem to be functioning as intended. I only tested for about ~5 minutes but I didn't see any items being deleted. Thank you!