Vibration alarms doesn’t function when HR is off

This is not true for me. I've just set an alarm for in two miniutes, disabled HR like you mentioned and I was greeted with bzzt bzzt in the right time. Fenix7X-SS with the same firmwarenumber

Thank you for the reply. I’ve tried a few times and it is definitely this setting for me that is preventing the alarm. I’ve emailed Garmin and they’ve responded to say they’ve had a few reports and are investigating. 

Maybe it's this know issue?

https://forums.garmin.com/outdoor-recreation/outdoor-recreation/f/fenix-7-series/353881/vibration-stops-working-after-pc-charging-using-v15-74-or-v15-76-software/1706411

Possibly linked. 

Order of events for me were something like -

• Disabled hr
• Disables moveiq
• Disabled heart rate alerts
• Disabled smart notifications 
• charged watch
• enabled alarm
• went to bed
• alarm didn’t vibrate

It’s always worked faultlessly so I realised it must have been due to one of the settings I changed. I toggled the hr sensor on/off to test and it would only vibrate with it on. 

Well that was this morning, I’ve tested again just now and toggling hr isn’t affecting the vibration alarm! Perhaps there is another factor at play like newly created vs existing alarms, or something else.