git svn pushing to wrong branch

Hello dear gitters,

I've been trying to use git-svn to work with branches. When I merge branch A 
into branch B, and then do a dcommit, the change is not pushed to branch B. 
I've attached a bash script that demonstrates the issue. I've tested with svn 
1.9 and git 2.5.

The problem goes away when the merge is done with --no-ff.

Best regards,
Jos van den Oever