Summary

Yes i did, and still does not work. Last version that works is 6.1.6 i think (i can confirm tomorrow).

What is interesting, i can make it work to some extent by unlinking head morph geometry, then when i rotate head(final mesh separately) hair guides do not bend, however when i save and re-open file it still bends them (it all looks like every guide has look at constraints towards pivot)

Basic setup i am using is morph mesh (head with morph targets) linked to rig (cat rig or bones), skin wrapped mesh (final renderable mesh) used as base GEO for grounding strands. I always make sure pivots are exactly same (they are usually exported from zbrush so they are) and they are in this case (first i i checked. As i said everything worked up until now, and when i initially attach them everything worked up until i i reload scene, that is why i wasn't sure if I did something wrong in the process, so i tried de rooting and rooting 100 times.

Final confirmation was when i created sphere, and single line, grounded that line and confirm it does not work.

Tested in max 2018 and 2019, completely reproducible.

Version that works is 6.1.7.19437

Ok, since this is not reproducing on your side, i have made small video showing how it affects.

I would send small scene, but this is not scene related and you will see this in video i am uploading.

Here is the link to the video MEGA download

https://mega.nz/#!hU8n1ADI!8fzHsyUf8D-0745yERu2ex5TezTrwzig00A_g1s7hrM

embed in case it works on forum:

Small scene you can see at the end of the video: 

https://mega.nz/#!1All3QIA!siO3_V4uJz6Fs2SpErkQZyHaMQd2dJ0fb9BcLWvqjBo

Take care,

Ivan