any idea concerning dead pixel on pics

Hello

i notice from a few days a white dead pixel on my 6D pics

The location isnt the same each time and this doesnt happen on every pic

Raw (normal or M), high iso ( +/- 3200)

Large apertures used actually (f2 / 2.8) canon 135 f2

I dont worry that much, just i would like to have advices before going to the store speaking about it

I love the camera, wont change it for anything else