Apple has released watchOS 5.1 update which includes improvements and bug fixes:
• Apple Watch Series 4 automatically contacts emergency services if you are immobile for about a minute after detecting a hard fall. The watch will also now play a message that informs the responder that the Apple Watch has detected a fall and shares your location coordinates when possible.
• Fixes an issue that could cause an incomplete installation of the Walkie-Talkie app for some users.
• Resolves an issue that prevented some users from being able to send or receive invitations on Walkie-Talkie
• Addresses an issue where some previously warned Activity awards were not showing in the Awards tab of the Activity app for some users.
The update’s available now.