Sleep Is Not Recognized after a Wake-up period?

Oura doesn’t recognize my sleep after waking up in the middle of the night. I’ve been struggling with waking up at 2-4 am and then needing 30 minutes to an hour+ to fall back asleep.

When I fall back asleep for another 1-3 hours, my ring sometimes classifies it as a nap, but often doesn’t capture it at all and just says I woke up at 4 am.

Is this a known flaw?

My Apple Watch has no issue noting the gap as awake time, and then adding the second sleep stage (which often did have rem/deep sleep).

I’ve tried not opening the app during the awake time, but it still doesn’t record any sleep after the initial wake up.