docker in docker: Error: there is no registered task type 'docker-run'

When using the docker in docker feature docker tasks are not detected:

The output gives:
```
Error: there is no registered task type 'docker-build'. Did you miss installing an extension that provides a corresponding task provider?
Error: there is no registered task type 'docker-run'. Did you miss installing an extension that provides a corresponding task provider?
```

My suspicion is that the tasks.json is parsed before the addon is installed.