I must have missed something, but I can't get push notifications working for the Slack app on my Android phone.
In the settings of the app, I've set the Send me push notifications for option to Activity of any kind, with a Push timing of As quickly as possible. I also deactivated the Do not disturb feature just to be sure.
The Slack app is authorized to send me notifications in the OS settings.
What did I forget? Is there a hidden option in the Slack web application that I'm not aware of?