I have a very similar setup.
A couple of things.
What is your intended use for the beans considering you have pulled them so early/light? Some kind of manual brew method filter / pour over?
I have been enjoying these beans pulled just starting second crack for espresso.
I aim for 14 - 16 deg / min temp rise to 150deg
10 - 12 deg / min to FC
At RFC I start to wind down to 3 - 4 deg / min to get me to the first snaps of second crack.
EDIT: Sorry looking at your temps you may have well indeed been close to 2nd crack and its just the flash showing up the beans wrong or uneven roast. Even more I would recommend a much gentler / slower ramp, reaching FC around 11 - 13min, with a total roast time around 18min.