Just wanna say, I had a very similar experience during the August LSAT Flex where I felt like I was in autopilot. It went so smoothly that I after I finished I thought either it went the best it ever could have or I majorly messed up. Thankfully, it was the former and I walked away with a 170+ score. I just wanted to let you know because you said you hadn't seen somebody with a similar experience who ended up getting their goal score. Of course I can't say what you ended up getting but I can say that I felt similarly during my exam and did well, so there is hope! I wish you all the best!