This may happen if the user installs two or multiple plug-ins. Firstly ensure that you don't have another push notification plugin as it could be displaying the other notification.
PushAssist SDKs do not allow notification duplication, it checks the notification id so two will never be created from our official SDKs.
If you are still facing the problem, get in touch with our support team with following information
- Version of our SDK
- Device OS version
- Building on Mac or Windows
- Any other libraries or plugins in your app
- Details on reproducing your problem.