KitchenAid oven not getting to baking temp

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Brand: Kitcheanaid
Model Number: KSDG950ESS2
Main Symptom: Will not get to temp nor hold temp. I have replaced both the baking element and the temp sensor
What happens & when: When I use standard bake or convect, the oven will not get to target temp. If I cancel mid way through and reset preheat, the starting temp is below the temp that was listed on the screen before I cancel.

Error Code (if any):
Parts or tests already tried: Baking element, temp sensor, main board. This is a 3 year old range.
Photos / video link:

Does it look like the broil element is cycling on when you’re running preheat? It uses bake and broil to preheat more quickly, cycling them on and off.