SharePoint User Profile Change Log for empty changes

Hi,

We've been using the User Profile Change Log to keep track of user's changes in their profile.

I've included the code snippet I use in C# below.

My problem is that changes where I remove values to SingleValueProperties do not seem to appear here.

For example, if I have WorkPhone property that was initially set to a phone number. Then I remove that phone number and save it, this change is actually not captured in the Event Log.

I verified this by going to the SP User Profile Database and checking the UserProfileEventLogValue and verifying upon changes that those I set to empty values do not get logged here, but it does when I set non-empty values.

Can someone help me be able to keep track of changes including ones that are set to Empty?

Thanks!

CODE:

UserProfileChangeQuery changeQuery =
                    new UserProfileChangeQuery(true, true);
                    UserProfileChangeToken changeToken =
                        new UserProfileChangeToken(startDate);
                    changeQuery.ChangeTokenStart = changeToken;
                    changeQuery.Anniversary = false;
                    changeQuery.SingleValueProperty = true;
                    changeQuery.MultiValueProperty = true;
                    changeQuery.DistributionListMembership = false;
                    changeQuery.SiteMembership = false;

                    UserProfileChangeCollection changes = userProfile.GetChanges(changeQuery);