This is probably not helping you much but I think some people just don't fare well with the ATG passes.

In the past, people were not always getting BBS from barbers - they just looked clean shaven. Barber manuals warn against performing ATG and the danger of ingrown hairs, etc.

I used to get some ingrowns with Gilette and electrics, maybe even with a DE, can't remember. Not so with the straight. I do ATG in some parts (where I used to get ingrowns) but I rarely go for BBS. Can't remember any ingrowns for a long time.

Maybe you can try stretching less? (if you are stretching pretty aggressively)?

Cheers
Ivo