git-svn stomps on user properties

I'm using git-svn to track an upstream subversion repository. This upstream repository has several "user" SVN properties (i.e., not in the svn: namespace). A recent git-svn dcommit resulted in one of these properties being reverted.

Here's what happened. I started a git-svn dcommit of 3 very large commits. In between commits 2 and 3, a commit was made by another person that changed one of our user properties. When git-svn sent the third commit, it also reverted the property to its value before the other's user's change.

Why did that happen? Surely it isn't expected behavior. Glancing through git-svn, I don't see anywhere that it deals with properties directly, outside of svm/svnsync properties.

Thanks for any help or insight you can provide