New Identity does not always clear all OCSP/favicon related network activity

Steps to reproduce:

1. Bookmark 10 (randomly chosen) pages
2. They should show up in the "Recently Bookmarked" menu. There click on "Open All in Tabs"
3. Click on "New Identiy" after making sure that there are actual some connections under way.
4. With a high percentage there are favicon and/or ocsp cache entries left in the new session (this happened for me in 5 out of 7 cases)

Could be that these cache entries are due to ongoing network activity. I have not checked that yet.