Heroku Redis gets a wrong version number error in logs

I am using Heroku's Redis add-on. I upgraded yesterday to a higher tier and now I'm getting this when I send requests to my server. Any suggestions on what this error log means?

Apr 03 07:00:24 myapp app/redis-flexible-99415 Error accepting a client connection: error:1408F10B:SSL routines:ssl3_get_record:wrong version number (conn: fd=12)  

I am connecting to Redis as so:

import Redis from "ioredis";  import { Job, Queue, Worker } from "bullmq";    const client = new Redis(process.env.REDIS_URL, {      connectTimeout: 30000,      tls: {          rejectUnauthorized: false,      },  });  ...  

https://stackoverflow.com/questions/66932042/heroku-redis-gets-a-wrong-version-number-error-in-logs April 03, 2021 at 10:03PM