No notifications on 2v13.123 cutting edge build

I have set up 2v13.123 with install of default apps in stable app loader. Then installed Android and Messages. Notifications are working fine.

After installing Weather the console shows the following error, no Notification on the Bangle:

>GB({"t":"notify","id":1575479849,"src":"Hangouts","title":"A Name","body":"message contents"})
Uncaught ReferenceError: "_GB" is not defined
 at line 7 col 59 in weather
...eather")update(event);if(_GB)setTimeout(_GB,0,event);
                               ^
in function "GB" called from line 1 col 94
...,"body":"message contents"})

After removing Weather app notifications work again.