I have a GPSMAP H1i that the notification sounds are working intermittently on. I have the latest 10.13 firmware installed. I've been testing the off course alert in the marine settings. The majority of the time the GPS just vibrates only and no sound. I've also noticed that when enabling WIFI when it the sound works, the gps displays a message about not all features work with WIFI enabled. Then the notification tone plays. That's not consistent when turning on the WIFI. If I set the tone to a different sound in the connect app with Bluetooth the GPS plays the notification tone every time it's changed. It works the same way on the device menus when changing the tone settings. I suspect notifications or alarms in general are having issues with this firmware. Is anyone else having problems with the sound alerts on the H1i?