[BUG] Notifications not sending using default settings

Description:

For some channels no notifications are send out, which is for a while now. When I force the notification preferences to always send notifications for that specific channel, it works. Also notifications for private messages and (sometimes) livechat sessions does work. Channels using the default settings, don't work.

Server Setup Information:

• Version of Rocket.Chat Server: 0.61.1
• Operating System: Ubuntu 16.04 LTS
• Deployment Method(snap/docker/tar/etc): docker
• Number of Running Instances: 1
• DB Replicaset Oplog: disabled
• Node Version: v8.9.3

Steps to Reproduce:

Use default configuration for a channel and try to send a notification (e.g. 1 person sends a chat message, the other should receive a notification.)

Expected behavior:

Receive a notification.

Actual behavior:

No notification is send to the device at all (according to the logs).

Relevant logs:

See this issue RocketChat/Rocket.Chat.Android#654 where I've traced it down to be a backend issue.

The following channel does not work:

The following channel does work:

My preferences:

Default user preferences:

General Notification settings:

And push settings:

Start with Rocket.Chat.Android#654 and its backend finding, then trace how default channel notification preferences are handled versus forced preferences. Reproduce the failure using the stated default configuration and verify that eligible devices receive notifications for default-configured channels.