Stella Core b/w

Hi, there has been an issue that has been occurring in the Stella core that has been around for a long time.

When I play Air Raid, the game starts out in color but flicks to black and white color and then back to color when the game starts moving. I know the Atari 2600 had a black and white Switch on it, but not sure if this is an actual bug in the core. This happened with a few other games I’ve tried as well.

Thoughts?