Boost disappeared while driving it.

Description : My friend and I we're doing a C Class boost, I completed the first 2 hacks while he was driving. I went in for the third hack and as soon as we heard PD Sirens showing up the car beeped three times like it was low on fuel and then just vanished. We had checked and the car wasn't low on fuel 1 minute prior. I dont care about the SVC just letting you know.