Ive had this happen to me twice now; if I sneak over the bundle or use one of the number buttons to swap inventory contents and it is the bundle; the game crashes and the bundle and all item contents are voided.

IM unsure if its a movement optimization mod like Inventory Tweaks causing this to happen but instead of trying to fix that It might be better if you include a slot blacklist to prevent Ritual Pouches in general from being accepted into any of the Ritual Pouch's slots. That would hopefully in turn prevent this issue from happening altogether

Fixed in version 1.0.785. It is no longer possible to put Ritual Pouch inside of itself.