Apple Watch Ultra 3 battery indicator not updating

Hello,

I have bought AWU 3 five days ago and since today, battery level

isn't updating properly. I have not smashed or dropped the watch, only

recorded couple of activities and charged it twice. Today I charged it

to 95%, did a 1 hour fast walk activity and after that, it still showed

95%. At first, I was pleased with battery life, but then it occured to

me, that it has to be some kind of bug. I restarted the watch and then

it correctly showed 89%. But since then, few hours passed and it still

showed 89%, so I force restarted the watch this time and again, it

showed the correct charge level.

The battery still isn't updating, I unpaired and repaired the

device, put it on charger, but nothing helped. Is this a known bug or do

I have some faulty unit? It's my first apple watch along with first

iPhone, so I am not familiar with this ecosystem. Everything else works,

but now that I think of it, the distance walked on stock watch face

doesn't update either, but it resolves when I manually press it, the

device doesn't need to be restarted. Any advice? Thanks.