Getting error "received invalid properties 'activeWhen'" with json routes

[jhaskett]

using: Single Spa Layout 1.6.0

I'm creating our routes through json like so:

let baseRouteArray = [
      {
        type: 'nav',
        routes: [
          { type: 'application', name: 'name1', props: data.props },
        ],
      },
      {
        type: 'route',
        default: true,
        routes: [
          { type: 'application', name: 'name2', props: data.props },
        ],
      },
      {
        type: 'route',
        path: 'somepath',
        routes: [
          { type: 'application', name: 'name2', props: data.props },
        ],
      },
      {
        type: 'route',
        path: 'anotherpath',
        routes: [
          { type: 'application', name: 'name3', props: data.props },
        ],
      },
    ]

    routeArray.push(...baseRouteArray)
  }

  const routeJson = constructRoutes({
    mode: "history",
    base: "/",
    disableWarnings: true,
    routes: routeArray,
  })

When the routes are being created though the property activeWhen is being added to the routes as such (path names removed)

Because of this on the console for each route we get the following message:

Error: Invalid routesConfig.routes[1]: received invalid properties 'activeWhen', but valid properties are type, path, routes, props, default, exact
    at g (single-spa-layout.min.js:2:2303)
    at e (single-spa-layout.min.js:2:6301)
    at E (single-spa-layout.min.js:2:3133)

Haven't been able to get the error to go away with any settings I've made. We do not get this if we use HTML layouts, but we have some routes that are only available based on the users URL.

Any help would be appreciated.