No nap recording?

My 945 LTE seems to do a acceptable job recording my sleep, but it seems like it's not recording my naps. First time I had a nap I thought the watch didn't catch it as it only was 30 minutes, but then had a longer nap & the same thing. Is it because of some time setting or does it somehow lack nap recording? If it lacks it can Garmin please add that functionality please cause my older Samsung Gear Sport had that function. Thank you.