If you set custom notification settings before, but you don't receive the notifications you expect any more, you can reset your settings. Doing so removes any exceptions, and the notification settings return to their default values.
You can reset your notification settings for communities, channels, group chats and direct messages (DM). Here's how:
1
From the tab bar, tap Communities
to reset your notifications settings in a community or channel, or tap Messages
to reset your notifications settings in a group chat or DM chat. 2
Tap the community, channel, group chat or DM chat where you want to reset the notifications settings.
3
In the top navigation, tap More options
. 4
Tap Notification settings
. 5
Tap Reset to default notifications settings
. 6