Param masking clears path

I've got a route that requires a path param e.g.

path: 'dashboard/$userId

path: 'dashboard/$userId

.

I also want to use masking to hide some information from the URL.

When I navigate, If I do:

navigate({to: "/somepath", mask: { { search: {} } } })

navigate({to: "/somepath", mask: { { search: {} } } })

My URL changes to "/".

What can I do to fix this?