I can confirm this, with the default (layer 3) I have no cooling

Same for me, no cooling when starting on layer 3, but it works when starting on layer 2.

I wanted to push the limits and I didn't understand why I can print up to 500 mm/s but with so many blobs on the decelerating parts until I found this issue and I check the printer (my mistake).
When not noticed, inspection of the prints leads to misunderstanding of the speed, acceleration and cooling basic functions.
The results where still interesting, so attached two photos of my PLA prints (with/without cooling, front and back).

Same for me, Cooling fan in Speed & Max Flow Tuning only works when layers are set to 2, Glad I read your readme

+1

only works when layers are set to 2

very frustrating, as I was pulling my hair out like others thinking I had gone crazy (can't print at 60mm/sec feedrate without it looking like crap ;)

M106 is missing from Layer 3 or Layer 5 if selected. Only present on Layer 2 if selected.

looks like it's supposed to replace a token (fan3 or fan5) in one of the templates in speed.js
https://github.com/teachingtechYT/teachingtechYT.github.io/blob/master/js/gcodeprocessing.js#L459-L473

but they only contain the fan2 token, so never get added for the case of selecting layer 3 or 5