TYPO3 Core

This route enhancer configuration returns a wrong value for the c_step parameter:

routeEnhancers:
  Aimeos:
    type: Extbase
    namespace: ai
    routes:
      - { routePath: '/b/{b_action}', _controller: 'Basket::index' }
      - { routePath: '/co/{c_step}', _controller: 'Checkout::index' }
    defaults:
      b_action: ''
      c_step: ''

It works at first but later on, URLs like "/co/address" won't return ai[c_step]=address any more but an empty value instead. It's not deterministic when this happens and the pages are not cached.