How to send a push notification with vibration to the Android 8+ device?
Please note that starting from Android 8.0, it is necessary to specify the Android Channel in the "Android root param" filed along with the "Force Vibration" parameter.
Take a look at the screenshot below. For example, let's call this channel "vibration".
Once you have sent the notification with this channel, the respective channel with specified settings will be created on the device. Now, in order to send the notification with the vibration to Android 8 devices, it will be necessary to specify this channel with the vibration parameter.
For devices that have the version of Android lower than 8.0, try to use only the "Force Vibration" parameter.