Can't use same named parameters in matrix style url

[withjam]

When I attempt to use a url with multiple params of the same name (something that works fine in standard html urls) the activatedRoutes.parameters object ends up with only the last value. I would expect an array of values for that parameter, as has been the case for a while.

myhost/mypath;foo=bar;foo=baz should give me foo: [baz, bar] or something equivalent, instead I get { foo: baz } and lose the other values.