Yeah that looks like one injector is sticking open or something. Could be a wiring issue. Take the sides of the Sniper off and carefully check the connectors. Sometimes the connectors come undone or partially undone so that could be the problem. If it is just the connector then you can snap it back together and be good to go.

You can pop the injectors out and take them to a local injector cleaning service. Around here we have Doctor Injector, not sure what you have back there. I don't remember what the injectors come out of, but they aren't a Holley unique part. They are some sort of production injector.