Backlight remain on at 1% or less

Hello
My fenix 5x has the following issue
The backlight remains on all the time. The amount is less than 1% but it is enough to see the screen (and hour) in complete dark
That occours with any adjustment (backlight time out, intensity, gesture, etc)

The battery stays more or lees fine. If I don't touch the watch, the battery goes down 4% by day, and yes, with this 1% of backlight on all the time. And yes, after a power cicle everything remains the same

Anyone with this issue?

Firmware 7.0 currently, but same problem (maybe less intensity) with firmware 6.0