55k miles on a '23 hybrid
I have started to hear a lurch and clang when braking from 20 to 30 mph or less. It feels like the car briefly loses the ability to brake before regaining it.
At low speeds, this is not the same as the grabby brakes.
Could there be a problem with the braking system here?
I experienced the clunk too. I believe there was a recall to update the software, because mine has been fixed.
In the case of a hybrid, genuine breaks are replacing regenerate. 
That makes sense, but the fact that it only began to happen after 50,000 miles worried me.
Although I acknowledge that it is something similar, it should not be particularly obvious, if at all. It’s really smooth, so I am not really sure, but I guess I can notice sometimes when my physical breaks take over. It sounds very much like there might be a problem.