[BUG] Duplicate push notifications on iOS with iGotify 1.5.5

[gabriy2]

🐛 Bug Description

Each Gotify message triggers two push notifications on iPhone instead of one. The duplication only affects push notification delivery, the in-app message list correctly shows only one message.

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✅ Expected Behavior

Each Gotify message should trigger exactly one push notification on iOS.

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❌ Actual Behavior

Two identical push notifications arrive on the iPhone for the same message. Opening the app shows only one message in the list.

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🔁 Steps to Reproduce

Steps to reproduce the behavior:

1. Have iGotify iOS app and iGotify-Notification-Assistent container running
2. Send any message to Gotify (manually or via an external service)
3. Observe two push notifications arriving on iPhone for the same message
4. Open iGotify only one message is listed in the notification tab

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📱 Environment

Device: [iPhone 12]
OS & Version: [es. iOS 26.4.2]
Container Version: 1.5.1.3
iGotify Version: 1.5.5

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✔️ Checklist

Please confirm the following before submitting:

• I searched existing issues to avoid duplicates
• I provided logs or explained why they are not available
• All sensitive data has been redacted

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ℹ️ Additional Context

The release notes for container version 1.5.1.3 mentioned that a fix for duplicate notifications was included in the upcoming iOS release. The issue appears to still be present (or has regressed) in iOS app version 1.5.5 with container 1.5.1.3 and Gotify server 2.9.1.
No errors appear in the Docker container logs of iGotify-Notification-Assistent. The container runs without any warnings or errors. The only observable symptom is receiving two identical push notifications on the iPhone for each message there is nothing in the logs that indicates a problem.

[androidseb25]

Hi can you share me please the iGotify log (container), maybe there is a double connection of the websocket.

Because i had and many of my testers, this error again

[gabriy2]

Here are the container logs. The duplication is clearly visible.
For the test message (id:117, sent once) the log shows:

Message converted: {"id":117,...}
WS Instance from: CF2TynCFoiZCO2T
Message converted: {"id":117,...}
WS Instance from: CzLQnYUfxQrFBLg
{"Message":"Message is sent!",...,"Status":200}
{"Message":"Message is sent!",...,"Status":200}

The same message is processed twice, once per WebSocket instance: CF2TynCFoiZCO2T and CzLQnYUfxQrFBLg.

[androidseb25]

ok now we have you're problem.
Go to the docker data folder from iGotify under /var/lib/docker/volumes/igotify.../_data/ there you will find a users.db sqlite database open it and delete one of that instances. restart the container and you get one message