Brake Abs Warning Light problems of the 2017 Hyundai Santa Fe

9/18/17 while driving on highway at 65 mph the abs light came on and the vehicle while trying to accelerate moved slow as if to not want to shift. I got to the side of the freeway and turned the vehicle off and when I re started a few minuets later the light went out and vehicle operated without out problem. I made appointment with dealership for 9/26/17. They did some recall items and I mentioned the problem and was told if the light is out it may not show up. The failed to not on service order this issue. On 10/24/17 while driving on freeway and had traveled about 50 miles from home the abs light came on again and this time it notified me on the radio screen to contact blue link as there was a possible condition with the brake system. I contacted blue link and they made an appointment for 10/27/17 at 8 am at the dealership. After 6 hours waiting on Hyundai tech support to get back with them to run diagnostics. Last 3 months vehicle monthly report on vehicle shows a problem with the abs system. They claim they are unaware of any issues. 10/24/17.