Storage drawers can't be accessed with empty hand and off-hand with items.
You need to have an empty off-hand to be able to access it with the Shift+Right Click command.

I don't know if it was a known issue but as it is not mentioned in the description of the mod wanted to make sure it is known for the community.

Just ran into this as well. Is this a feature or a bug? Based on #301 I assume it's a bug.