git svn --use-log-author misbehavior?

Hi,

According to the documentation, this parameter (--use-log-author) should 
  use the author from the From/Signed-off-by line. Unfortunately, I 
found this to be working only on the first git svn clone. Later rebasing 
made the commits use the old username@uuid format.

I am assuming the option is not being preserved in the Git repository metadata and it is only used on cloning/init. Is this the intended behavior?

Many thanks.