Modpack version
1.82a

Issue
Put an item in the first slot close the dank open it again,pull the item using the GUI place the dank using the feature from DE (default P?)pick it up by right clicking and there you go you can pull the item again (tested with MK2 dank )

Thanks for the report. I'm afraid there's not much we can do about this, updating the DankNull mod usually doesn't turn it well :P