Sleep tracking curiosity

[Mladen90]

I don't have any issue with the sleep tracking except that fitbit seems to show a lot of short awake moments that i don't remember with previous bands(no need to compare because they were different products).
Considering that it's showing all these short awake moments can someone try to explain what happened during the night shown in the below screens? 😄 
As you can see from the HR i definitely was not sleeping but the fitbit recorded it differently...showing also deep sleep? ‌‌
I was looking TV until late because i had my cat sitting on myself and the arm on which i have the watch...and yes, i didn't move the arm for more than 1 hour so i can understand a bit why it recorded it as i was sleeping but still the HR is completely out from my sleep's average.

If one of the main factor is the movement of the watch isn't it a bit weak as system?

But it's still strange because the spike of 72b/m shown in one of the screens is like 15 minutes or a bit less and it's when i stopped to watch the tv and i prepared to go to sleep(i walked too in those 15 minutes).

Just a bad night for the fitbit? It's just a curiosity...in 40 days, it happened only once.

[Marrrmaduke]

@Mladen90 this is normal. Actually that's how my 'good' night of sleep looks like 😁 as I toss and turn a lot. In reality, we do not remember these short periods of awake time. 👍🏻

[Mladen90]

@Marrrmaduke

Yep, i'm not asking about those short awake moments.

I understand that fitbit is(should) be more accurate than some other cheap bands.

[Marrrmaduke]

@Mladen90 it's because right after that tv-cat break you went to bed. Fitbit assumed that you were already asleep. For me, quite often the first part of the sleep is way over my sleep average hr. 😁 It's the cat! Mine does the same to me. 😁