Car Stall problems of the 2013 Cadillac SRX

My car had been stalling, or "jerkimg" when a accelerating for a week or so before the following incident, but due to the shelter in place ordinance, l put off taking it to a mechanic. However, my car finally shut off at a stop light, causing a distracted driver to nearly rear end me. A friendly driver assisted me with pushing it (traveling north on mannheim rd in hillside) to an amoco station. I called onstar iinitially to get it towed, but since my father is a retired mechanic, l called him. He was able to start it and drove it to their home just a couple miles from that location. He checked with a fellow/workimg mechanic and he thought the problem was a air flow sensor. That part was replaced a couple days later. I drove the car to run several errands and as l was leaving the grocery store on st. Charles rd in berkeley, headed east, the same thing happened. Again, my father met me at the location, got it to start and drove it to a working mechanic. After placing it on a machine for review, the mechanic stated that it appeared to be the catalytic converter as he didn't see anything else wrong. I was checking online for pricing before agreeing to repairs only to discover that there was a recall on the same make/model for hesitation in acceleration, due to the catalytic converter. Now, l'm wondering if there's a faulty converter issue on my end, and l'd like this to be investigated.

Stopped at a light. Light changed to green and pressed peddle to accelerate. Vehicle started normally into intersection and then would not continue for 5 to 7 seconds. The engine was at idle, not stalled, and would not respond to the peddle no matter what input was rendered. Been to dealer several times and even had a recorder installed, but they could find nothing wrong and returned the vehicle to us. This will eventually cause a fatality.