Does Honda Accord (EX+, 2018+) adaptive cruse control innclude braking to maintain speed going down a slope?

I’ve had a 2018 Honda Accord EX, and now a 2020 Honda Accord EX. Both have "adaptive cruise control with low-speed follow". So with low-speed follow it’s pretty clear that the computer, under cruise control, can control the brakes (you can feel it as well as see it when driving).

So: How come when going down a slope (not a hill, just a slope, probably <3%, or even <2%) the car will sometimes speed up far past the set speed, with ACC active?

The annoying part is sometimes. Actually it is most of the time that it speeds up far past the limit. Sometimes it holds to about 3-5mph past the limit. And I’m talking about the same slope – a road near my house I drive daily.

Should these Honda Accords be braking? Or should they not be braking? (I’d prefer braking, but would accept not braking. Sometimes braking seems braking. I mean, breaking. I mean, broken.)