On 10 June 2021, an Embraer 170-200LR was cleared to line up and wait on runway 27 at San Diego with a Boeing 737-800 already cleared to land on the same runway. The occupied runway led to ASDE-X activation which prompted a controller go-around instruction to the 737 when it was less than a mile from the runway displaced threshold but this was blocked by an undetected simultaneous transmission from the E170 which had just been instructed to exit the runway. The 737 manoeuvred around the E170 as it attempted to exit the runway, before touching down beyond it.