What you have there is what is called a “Tomb Stone”, which is a result of what we call “Collateral Damage”.
When we treat a follicle, often there is a telogen/shedding hair visible, while unknown to any of us, an anagen/growing hair is down below the surface of the skin, lower in the same follicle. When we treat that follicle, the smaller hair is treated, but unless it comes out with the shedding hair, we don’t know about it till it starts to be pushed up to the surface later by the bodies immune responce, and/or natural shedding process.
The other way Collateral Damage can cause a Tomb Stone, is you treat one follicle, and spillover treatment energy manages to treat a lone hair in an adjacent follicle that is in early Anagen/Growth state, and stops it in its tracks. This hair will now stop growing, and “float” to the surface with either shedding or/and immune responce.
This is natural, normal, and not a sign of overtreatment. We just call it Collateral Damage because it is the same thing as the military term, where one hits a target perfectly, but their is spillover to outside structures, and areas that cause a quantifiable hit on other targets, that may or may not have a positive value to your goals.
It that clear at all?