"Create Bill" from port view won't include port in the bill

When selecting "Create Bill" (leading to ".../bills/view=add/port=123456/" from the port view of any device, the billed port shows up correctly during configuration of the bill under billed ports but once the configuration is submitted and you verify the bill, there are no ports assigned to the newly created bill even though it was created from the interface and the interface was shown correctly under billed ports during configuration.

It works fine when creating the bill via ".../bills/view=add/" and then adding the port to it.