I was driving on Single Pedal Drive on a freeway with the 2024 BMW IX, there was a slow down ahead of me. I removed my foot from the pedal and waited for car to slow down, but car didn't slow down enough. Then I slammed the brakes hard, but the brake didn't engage. In fact, brakes were pushed back against my foot. I was slamming the brakes as hard as I could, but i couldn't feel the brakes letting me me bottom out . This was a very traumatic experience. I have been able to reproduce it once again, but not always. But BMW dealership doesn't want to accept any problem. Thankfully, I had slowed down, otherwise, this is a very dangerous problem. Please investigate this. This has caused a big cost burden for me and also quite a traumatic experience.