Current iOS group text notifications show up on my vivoactive with only the name of the sender and then the name of the people within the group text, nothing related to the text body itself. It's been this way since I believe iOS 8.3? (sometime in April)
I am unsure if it is a garmin connect or vivoactive firmware fix that is required, or if it is entirely an Apple iOS issue that cannot be resolved due to sdk limitations.
Some people might see this as a feature reply, but this is a function that used to work in the past, and honestly, it truly is an issue that takes away from the claims of this device as a smartwatch