CardView background colour automatically changing

[SourabhSNath]

I am having an issue where the cardviews in a 'Details' Fragment is changing to wrong colours. I am setting the colour to '?backgroundColor' and It works initially when I set the theme, but then it automatically changes to a colour value of #303030 when I close and Re-open the app

The ?backgroundColor tag is used in another fragment as the layout background, that doesn't change to this colour, only the card background colour changes to #303030 automatically

This is what it becomes:

This is what I actually set the colour values to, just #000000

[ItsCalebJones]

I'm seeing this issue quite regularly as well, can demonstrate the behavior in #44