Raspberry Pi 5 Power Light both Green + Red Lights (Yellow)

I have one Raspberry Pi 5 that has just the Green light lit when it's on. However, I have another Raspberry Pi 5 that has both Red + Green lights lit when it's on. I can't find any documentation on what this means when it's both Red + Green (Yellow?). As far as I can tell, it seems to operate OK.

Red = Power Green = Activity

I took the same thumbdrive and put it in another raspberry pi 5 and it turns green after powering on. i’m hoping it’s just the light but I’m contemplating returning it.