The Garmin software update previous released on March 31, 2022, that was labeled as a critical update is now being labeled as an urgent update that if not downloaded could lead to your device becoming unusable. See the message from Garmin below for more information:
“Garmin has identified an issue that can prevent the affected dog devices from working correctly. The status LED on the affected dog devices will continuously flash red when connected for charging. Installing the latest software will greatly reduce the risk of this issue occurring. If your device is already experiencing this issue, you will require a replacement device.
You can contact Lion Country Supply or Garmin Support (support.garmin.com) for a free replacement device.”
This update is now as an extremely critical update, so if you're running the new TT15X or T5X collars make sure to update your collars with this update!
Fixes to reduce the risk of a fatal error to the device.