Admin can't delete contacts if the user is opening the profile's editing form at the same time

Pre-conditions:
Two users (User1, User2) are registered.
In one browser (Chrome)open profile User1 with logged in User2.
In second browser (Mozilla)open profile User1 with logged in User1.
User1 has permission EDIT_OTHERS_PROFILE.
User2 has permission EDIT_OWN_PROFILE

Steps to reproduce:
1. In Chrome User2 click 'Edit Profile'
2. In Mozilla User1 click 'Edit Profile'
3. In Chrome User2 add contact:ICQ
4. In Mozilla User1 click 'Cancel'
5. In Chrome User2 delete contact:ICQ and click 'Save changes'
6. Update profile page in Chrome and Mozilla.

Actual result: In profile contacts of User1 there is still ICQ.

Expected result: In profile contacts of User1 shouldn't be ICQ.