Does your ecu have an ignition cut option/table for the ALS by chance? (only having the option to retard the timing to fire when exhaust valves are open is not ideal in my opinion. I believe i figured out a good solution to this for my AEM set though.
Also is your engine drive by wire? I'm assuming you're running a throttle kick style als no secondary air entering the exhaust system pre turbo?
PS always love watching the little turbine engine builds, nice video