I'm strongly against using nei_cheatmode/creative mode to get anything. While I do have op on server I'm playing on and this would be the fastest and easiest way around, I feel like every item spawned takes a whole lot of enjoyment from this game, even if its used to combat bugs like this.
Guess I'll spend a few hours getting myself familiar with this addons code and new api and I might be able to tailor a fix for myself. Haven't touched java for a long time so chances are slim, but if I manage somehow any potential fix will have to go through author of this mod to share, so it won't probably speed things up for you guys.