Main profile transparent or full blue

I am finding that my chosen setting of transparent for the main profile is changing at the start or after about 100m to full blue.On testing i found I can reproduce this change mid ride by pressing F11 to go to Full screen(profile changes to blue and there is no way to get back to transparent)I still cannot find why occasionally it starts on full blue but maybe related to new versions starting at default of blue?

Version 1.20.0.5525.
First ride starts blue and on restart changes to transparent.This morning i had exactly the same issue and my evening ride was back to full blue.I am using the coloured grade setting for the top of the profile.