New bug found at Inventory Templates

How to reproduce this bug:

1. Create a new Purchase Order.
2. Fill the PO with any dummy data but most important make sure you select a CONTACT in the look-up field, which has a phone and/or mobile phone number. Also choose a SUPPLIER that has a phone number.

3. Ok, now create a new PO Template at "Inventory Templates". Copy and paste the following:

${Contacts.First Name}
${Contacts.Phone}
${Contacts.Mobile}

${Vendors.Phone}

4. Save and go back to the dummy Purchase Order you just created. Click on the blue button "Print View" and select the saved template; you will see the bug immediately - the phone numbers are the same!! This means the system is INCORRECTLY linking the modules "Purchase Order" and "Contacts" (instead, it is linking to the "Vendors" data). Strangely, the "Contact Name" is correctly linked. Any ideas?