PeriodicWorkRequest not working periodically

I have built a simple PeriodicWorkRequest following Android's WorkManager docs here. I basically need a worker that runs every 15 minutes. However my worker is only running once and never again.

Here is how I start the work request:

PeriodicWorkRequest myWorkRequest =
            new PeriodicWorkRequest.Builder(
                    MyWorker.class,
                    PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS,
                    TimeUnit.MILLISECONDS
            ).build();

WorkManager.getInstance(this).enqueue(myWorkRequest);

My worker class is nothing but only a system log inside, just to test it. Here is the related part of the worker:

@Override
public Result doWork() {
    Log.d("Worker runs");
    return Result.success();
}

I am expecting this worker to run every 15 minutes. However, it only runs once at the launching of the app, and never again.

I have searched a lot and noticed a few things about it, but still no luck:

• Time interval is important and has to be minimum 15 minutes as also answered here. However, my interval is already the constant PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS so it should work with it. I've even tried with 16 minutes but does not work either.

• Another suggestion was using unique ID in case they are cancelling each other as described here. I've added a tag and started the worker as follows:

  WorkManager.getInstance(this).enqueueUniquePeriodicWork(
       UNIQUE_ID, ExistingPeriodicWorkPolicy.REPLACE, myWorkRequest);
  

  However this does not change and it still runs only once.

• I read that WorkManager has some bugs and might not work well on some phones. But I tried with different devices and emulator, and it does not work in any of them.

My WorkManager version "androidx.work:work-runtime:2.5.0" and currently I'm testing on an Android 11 emulator. Any help would be appreciated, thanks!