The shadow mode for ENTP is INTJ - both Te and Fi are present. However I do not think it occurs only over high-stress times, at least not in my experience. Sometimes after overly focusing on something for prolonged period of time I will feel sort of ENFP-like and it causes me to break away and go do something new. It can be a bit scary because I feel like I am not naturally aware of my limits in this state. Analyzing what triggers this it just feels like I'm just over-working my mind, thinking to much, focusing too narrowly, and it needs a break. Sometimes you might be stressed but simply not registering it as valid stress.
i sort of enjoy it but i also worry how i come off to other people
last episode people were a bit surprised that my behavior just suddenly changed
makes me less serious
last episode people were a bit surprised that my behavior just suddenly changed