Bug With Collections

Hi,

I've found a bug when using collections and QR-Code galleries. I'm using a collection with 8 pictures and activated option "Do not allow adding photos to this collection from different galleries, sub-galleries & different passcodes". The idea is that customers with different QR-passcodes cannot use the same collection. 

This works fine for customers with mobile phones or when you order in the same browser window. But when I use a PC (chrome browser) and open each gallery in a separate tab then I'm allowed to add pictures from different galleries.

Steps to reproduce the issue:

1. Open QR-Code gallery in tab 1

2. Add one photo to the collection

3. Open a different QR-Code gallery in tab 2

4. Refresh tab 2 to show the collection

5. Add photos from tab 2 to the existing collection 

Now you are able to fill the collection even with having the option activated.

I can not replicate this. It won't allow me to add to a collection from a different gallery in a different tab.

You can email me links to the 2 different galleries and which passcodes to use to replicate it. 

Also,