I noticed this for the Vivoactive 4 and 4s watches and saw there is one for the Venu too...
Obviously proceed with caution...
If anything, download it and keep the included V5.00 software for possible future use to revert back to.
https://www8.garmin.com/support/download_details.jsp?id=15289
Changes made from version 5.00 to 5.01:
- Improved Bluetooth robustness