NullPointerException when loading stoptimes for frequency-based trips

[miklcct]

Expected behavior

The request returns information about the trip and its frequency.

Observed behavior

A NullPointerException occurs.

Exception while fetching data (/routes[0]/trips[0]/stoptimes) : Cannot invoke "org.opentripplanner.transit.model.timetable.TripTimes.getNumStops()" because "times" is null

Version of OTP used (exact commit hash or JAR name)

2.7.0-SNAPSHOT, commit 30216e9

Data sets in use (links to GTFS and OSM PBF files)

Hong Kong: https://s3.gtfs.pro/files/sourcedata/citybus.zip

Command line used to start OTP

docker run --detach (pwd):/var/opentripplanner docker.io/opentripplanner/opentripplanner:latest --load --serve

Router config and graph build config JSON

Only ParallelRouting is on, no other config.

Steps to reproduce the problem

Run the following GraphQL query.

# This is an example query for fetching all routes of your OTP deployment.
# Click on the documentation icon on the left to read about the available types
# or use autocomplete to explore the schema.
query GtfsExampleQuery {
  routes(name:"258D") {
    gtfsId
    shortName
    trips {
      stoptimes {
        stop {
          gtfsId
          name
        }
        scheduledDeparture
      }
    }
  }
}

The problem doesn't appear if I change 258D to 258S. 258D has frequency-based trips but 258S doesn't.