(Serious Vivoactive 4 Bug) Vivoactive 4 always on High Power Mode when do not disturb and gesture are triggered

I think I discovered a serious bug on my Vivoactive 4 tonight, while doing a testing of my watchface with below scenario:

Watchface has two layouts:

1. Screen-Layout#1 when at low power mode

2. Screen-Layout#2 when at high power mode (The purpose of this layout is to save some battery when the watch is in do not disturb)

Testing:

1. (Gesture set to ON)

 initially before I lifted my hand the watch is in Screen-Layout#1 (LowPowerMode), I lifted my hand then the Screen-Layout#2 (HighPowerMode) and after few seconds the watch turned back to Screen-Layout#1. Meaning that the testing has passed. (Chance rate = 100%)

2. (Gesture set to ON, DND set to ON)

initially before I lifted my hand the watch is in Screen-Layout#1 (LowPowerMode), I lifted my hand then the Screen-Layout#2 (HighPowerMode), I waited for it to go back to Screen-Layout#1 but never happened meaning that the watch stays forever in HighPowerMode, and I noticed that the only way to back to LowPowerMode is by refreshing the screen by going to any widgets. (Chance rate = 90%)

I think it makes sense now because I remember one user of my watchface has a complaint that his Vivoactive 4 is draining the battery 60% a day.

I think it is a serious bug, has anyone experienced this or has it been reported?