ABS activates under medium braking and 100% traction

Hello there,
I've searched the forums a bit and couldn't find an answer - sorry if this has been covered.

I'm having an issue with my ABS:
Under arguably 'medium' braking, and with the slightest turn of the wheel, the ABS activates even though all tires are on dry pavement and have 100% traction. This actually could be quite dangerous if I have to increase braking while steering because sometimes the ABS activation can increase stopping distance while traction is 100%.

All tires are at the correct PSI

My brake light is on, however, so that might possibly be a symptom of the underlying issue. (It's the red "BRAKE" light that is on....not the ABS light)

Another side question...what are all factors that could turn on the red "BRAKE" light. (My parking brake is not engage, although maybe I should inspect the switch...)

Thanks all!