Boundary Events on Reusable Subprocess not possible in web designer 2.2 Final

Try to put a Boundary Event on a Reusable SubProcess directly and with this web designer version 2.2 Final it don't think it is possible.
A way to get around this issue :
You must first put the Boundary Event on a Basic Task first and then Morph the Basic Task to a Reusable Subprocess so that it works.