Brake Light problems of the 2017 Hyundai Santa Fe

Two issues: severe problem - when driving at a rate of approximately 35mph today on a major city thoroughfare, our 2017 Hyundai Santa Fe 2. 0t ultimate suffered a sudden and complete loss of power (engine and all electrical systems including lighting). After coming to a stop, the vehicle was stranded in place until it was able to start up again many minutes later. Fortunately no one was physically harmed as the individual driving behind our vehicle was observant enough to identify the issue (despite a lack of brake lights or hazards) and stop in time. No visible engine light or fault code was triggered. Less severe problem: on a regular basis, the vehicle suffers abrupt and sustained loss of power in merging situations (especially when turning on city streets from a stop). This seems to be from an overactive or otherwise ineffective traction control system/programming. Despite even planning for the possible loss of power, this has still resulted in a number of "near miss" situations. A warranty visit has been scheduled for these issue and we will gladly provide the results and/or other updates upon request. We are, however, seriously considering selling the vehicle at a loss due to these two issues.