Temp sensor, ignitor, control board, safety valve. Those are the involved components. I am not very experienced with samsung, other than to know they are a pain. I would start with an amp test on the ignitor and see what it's drawing. Should be drawing 3.6-3.7 amps. Amps are caused by the resistance in the ignitor. When it ignites the gas, the added heat may be just enough to knock the resistance down, dropping the amps and causing the safety valve to close.

Pull the bottom drawer out and at the very back there are some wires. They go up and into the oven. Check the amp draw on one of those wires. They lead directly to the ignitor. If you can't for some reason access it that way, pulling the bottom out of the oven grants access to the ignitor wiring as well. Hope this is helpful!