fenix 5 FW3.30 backlight bugs?

I think there are two bugs in FW3.30 on my F5 concerning the backlight.

Settings for backlight in watch mode:
- Keys: on
- Alerts: on
- Gesture: off
- Timeout: 30sec
- Brightness: 20%

1) If i turn my wrist fast away from my body (e.g. left wrist, turned around to the left) the backlight switch off automaticly. I've set gesture controlled backlight to off - this is not what i've expected...

2) If i set the backlight timeout to "never" the backlight will turn off (no diff wich watchface i've used) automaticly after 5sec
- if i choose 30sec the backlight will on for 30sec - only the setting "never" is faulty...

Did anybody have the same problems?