Nextcloud Talk iOS app no notifications

Hello! No notifications about messages and incoming calls from iOS app. If I delete app, or exit from account and login again (not always help), it works fine few hours or days, then stops working again.
I use my own TURN & STUN servers, but test it with standard servers and without it.
Any idea/solution?

iOS version13.5.1 (tested on many different phones & iOS versions)
iOS app version 9.0.1
server-sde version 8.0.10
Nextcloud version 18.0.4 (tested on 2 different servers 18.0.x)

Please update your Nextcloud to the latest version.
Either 18.0.7 or 19.0.1

Still have same problem on 18.0.7

Hi @Anry_Aleksov,
You can try to remove the old app tokens from (Nextcloud Talk) that you don’t use from Settings->Security-> Devices & sessions using the web interface.
Also updating the Nextcloud notifications app could help you to solve this issue.
Since there were some issues that could cause not receiving push notifications in some devices that have been fixed in the lastest version.