Sometimes No WhatsApp Notifications in Notification Centre. Only red dot

Sometimes (like 15% of the time) I don't get notifications from WhatsApp on my iPhone 13. No sound, no notification on the lock screen or notification center. Only the red dot on the App.

All the settings are OK, background app refresh is ON, notifications for the app are allowed, no focus mode is activated. I have tried to restart the iPhone, uninstall and reinstall the app. Still the same. It started with IOS 17.4 and it is still happening on IOS 17.5.1

The iPhone and WhatsApp have always been up to date. Any suggestion?