Health app is draining battery - iPhone SE 2nd gen + AW5

Hi,

I moved back from my iPhone 13 to good old SE 2020 last week. I migrated all data, Apple Watch 5 settings were moved automatically. All works well but the battery drainage is absurd. It barely can hold for half of the day. Battery is new, from official Apple Service, 100% health. I checked battery settings and stats and it seems that Health app is draining all of the power. I have few minutes of screen time and 30-45% of battery usage by Health app. I'm not syncing anything except of standard Apple measurements (no 3rd party apps on watch and/or Health app).

Any idea what may causing this? Any advices what should I do to stop Health app from draining battery so fast? First I thought that there are some sync jobs after migration but it's almost a week and it's like that all the time.

Thanks.