Why isn't my dynamically extended Zod schema enforcing types in @hono/zod-openapi?

export const createChannelSchema = ({ withVideos = false }) => {
  let schema = channelSchema;

  if (withVideos) {
    schema = schema.extend({
      videos: z.array(videoSchema),
    });
  }

  return schema.openapi("ChannelResponseSchema");
};

import { createRoute } from "@hono/zod-openapi";
const route = createRoute({
 ...
 responses: {
  200: jsonContent(createChannelSchema({ withVideos: true }))
 }
})
export type GetChannelByIdRoute = typeof route

import { RouteHandler, RouteConfig } from "@hono/zod-openapi";
type AppRouteHandler<R extends RouteConfig> = RouteHandler<R, AppBindings>;

export const getChannelById: AppRouteHandler<GetChannelByIdRoute> = async (c) => {
  const { channelId } = c.req.valid("param");
  const channel = await ChannelService.getChannelDetails(channelId);
  return c.json(channel, 200);
};