Since the last update my timer on my galaxy watch hasn't been working correctly.

I use the timer on my watch to monitor filling wash tanks. In the past when the timer was up, my watch would vibrate until I turned it off. Sometimes I would allow it to vibrate for a few minutes until I could get back to the tanks to turn the water off. Only then would I silence the alarm.

Since the update the watch only vibrates for maybe 30 seconds and then silences itself. This causes me to miss the alarm often and overflow my wash tanks. How can I remedy this, or do I need to find a new watch that doesn't silence its own alarms? I have reset and hard reset the device, to no avail.