Symfony version(s) affected: Symfony 4.1.7

Description
Using a parameterised boolean false for the lazy tag won't recognise it as boolean value. Hence reason, the service hello.service.calculator below is never "lazy". It becomes lazy only if explicitly set is to false.

How to reproduce

my_bundle.yaml

my_bundle:
    parameter:
        is_lazy: false

services.yaml

services:
    hello.service.calculator:
        class: AppBundle\Service\Calculator
        lazy: '%my_bundle.parameter.is_lazy%'

Test

$ bin/console debug:container hello.service.calculator
 ---------------- ----------
  Option           Value                                                                                                                                                                   
 ---------------- ----------
  Service ID       hello.service.calculator
  Lazy             yes
  ....

When I inject '%my_bundle.parameter.is_lazy%' into a dummy service to see the type and content I get bool(false) which proves that it is indeed a boolean false.

First of all, is this a bug? Then how can I use a parameter as shown above?

Thanks

Note: That parameter is configured in my bundle as ->booleanNode('is_lazy')->defaultTrue()->end().