strange behavior for non-logged-in users

Thanks for a great plugin!

Got some strange bug/behavior.

– being logged-in everything works as expected.

– if not: On the product page buttons do work and change the visible value in the input field. But it does not affect totals in the table(from Product Addons Plugin), which normally should be updated on every click. If I try to enter something in the field or just put the cursor in it the according value is picked up.

– scripts are loaded, no alerts in js console.

thank u in advance