Instagram, and Pocket import not working with redis.

I haven't been able to successfully run import from Pocket or Instapaper with redis.
A few remarks-

1. I am using mariadb for database.
2. Without redis, import works. However, the process times out after importing only a few hundred articles out of a total of a thousand plus articles. Running the same import again results in duplicate articles, rather than the next few hundred articles.
3. Here's my docker-compose.yaml
```
version: '3'
services:
wallabag:
container_name: wallabag
image: wallabag/wallabag
restart: always
depends_on:
- db
- redis
environment:
- MYSQL_ROOT_PASSWORD=wallaroot
- SYMFONY__ENV__DATABASE_DRIVER=pdo_mysql
- SYMFONY__ENV__DATABASE_HOST=db
- SYMFONY__ENV__DATABASE_PORT=3306
- SYMFONY__ENV__DATABASE_NAME=wallabag
- SYMFONY__ENV__DATABASE_USER=wallabag
- SYMFONY__ENV__DATABASE_PASSWORD=wallapass
- SYMFONY__ENV__DATABASE_CHARSET=utf8mb4
- SYMFONY__ENV__FOSUSER_REGISTRATION=false
- SYMFONY__ENV__DOMAIN_NAME=https://wallabag.example.com
ports:
- "41238:80"
volumes:
- /opt/wallabag/images:/var/www/wallabag/web/assets/images

db:
image: mariadb
restart: always
environment:
- MYSQL_ROOT_PASSWORD=wallaroot
volumes:
- /opt/wallabag/data:/var/lib/mysql

redis:
image: redis:alpine
```
4. Wallabag acknowledges that it can find Redis because on the import page it says on the top `Import is made asynchronously. Once the import task is started, an external worker will handle jobs one at a time. The current service is: Redis`.
5. I have run the following command: `docker exec -t NAME_OR_ID_OF_YOUR_WALLABAG_CONTAINER /var/www/wallabag/bin/console wallabag:install --env=prod --no-interaction`
6. If I revisit the import page, it keeps saying "Messages in queue: [SAME_NUMBER_EVERY_TIME]"

I will be more than happy to provide any logs or any other information needed to debug this issue. Please note I am new to Wallabag and dockers in general.