I think we've figured this out. May I ask what locale you are using in QRadar?
The text you are seeing should be getting replaced by localized/translated messages.
In previous versions of the app, if a localized message was not available, we would default to the english localization.
It looks like that functionality was broken in this latest release. So now if you use a locale without a translation available, you will see these untranslated messages.
We're working on a fix for this issue.