Flickering screen in activities on fenix 5s

Mine also oscillates the colors, I use the screen with the black background, but once in a while, it changes himself  to the white background alone, and also changes alone between the various screens during activities, and I have set in all activities does not change (just manually)

Climb pro?

Nop, i dont use it

Format device or contact support

Already did  factory reset. Still the same problem.
Changed the activities to black background, no flickering at all.
But every black on white page is nearly unreadable.

My second Fenix 5 Sapphire is staring to flicker. Already had one fail just over the 1 year warranty and thankfully Garmin replaced it, but this one only lasted 2 years. Very disappointing for such an expensive watch.