template resolution with includes issue

all

cluster_name: dev
another: foo
testing: {}

hosts

[localhost]
127.0.0.1

some_include.yml

# this is ok
- debug: var=cluster_name

  # this should be "foo-extra" but is "foo-dev"
- debug: var=testing

var_precedence.yml

- hosts: all
  connection: local
  
  tasks:
    
    - name: variable is the one from extras here
      debug: msg='{{cluster_name}}'
      
    # used in an include it should use the 'cluster_name' passed in to make foo-extra
    - {include: some_include.yml, testing: '{{another}}-{{cluster_name}}'}

      # used in an include it should use the 'cluster_name' passed in to make foo-extra
    - {include: some_include.yml, testing: { 
                                            somenested: '{{another}}-{{cluster_name}}'
                                           }}

if i call playbook with an extra variable to override the cluster name

ansible-playbook -i hosts var_precedence.yml -e cluster_name=extra

then I'd expect that 'testing' variable in the include file would be 'foo-extra' but because the templates are resolved early it ends up being 'foo-dev'