Do not disturb and alarms

I set an alarm on Garmin connect and synced it to my watch. I verified it was on and active on my watch. The alarm was set on vibrate only as I didn't want to disturb my husband. My watch is set on do not disturb at night because I don't want texts and calls to come to it at night. The alarm did not go off this morning at 6am when it was set. Once do not disturb went off  at 7:15 on my watch so did the alarm on my watch. How do I allow alarms on my watch when do not disturb is active. Is anyone else having this problem. My watch is up to date version 4.30.