Plz help me, dark background with red colour in ambient mode topic

IHello, I had bought this smart watch about 3 months ago.
I work perfectly but now i have problem.
When the watch change to ambient mode the screen very dark and it has red colour in background.
if the background is white, it will change to red.
How to fix it, plz help me cos it has no guarantee in my country.
plz, plz and plz.



It is normal when wake up.