Huehuetenango shb ep keeps overshooting profile after CC

[stever]

To start, I'm quite new to roasting so forgive my potentially fundmental questions...

Logs (I hope I attached the images correctly) show overshoot (diverge and proceed with an offset) after CC.

All roasts L 3.0. 'default' and '15002000' (for file/image) refer to the profiles. If the image attachment works, then I'll also note that I manually dropped the REST1500 roast because it was already quite hot. I have to empty the chaff collector after every roast.

These are the 4th and 5th roasts with these beans, and all previous behaved the same. Tasting notes: still grassy (underdeveloped?) but also a bit of smokiness/ash (overdeveloped?). Even after resting for a 7~10 days, there is little 'coffee' smell, and a slight scent of ash; i.e. very mild smell.

How do I address the overshoots in the roast? Could that be causing the unbalanced flavour?

Thank you in advance for any questions/suggestions!