After importing a Backup created in 7.305 the Filter assignements under Web Security » HTTP/S Profiles are not shown correctly. I had to recreate the profiles at all to get Proxy working.
Not sure if this is same issue as "[CONFIRMED] [7.350] Blank entries in object tables"
In my case the entries aren't displayed, when Time Event is >
See screenshots. Backupfile is internally available from me if needed.