This is still a thing, and has been for ever. Please make it a priority fix.
Forever Indeed.
And an other old one :
the infamous “Inside body glitch” mostly happening with big ennemies but which can also happen with NPCS as well though.
ennemies are litterally targeting the center of your model which can cause them to end up Inside your char. There is no way out of this one except jumping or crouching, which is obviously very convenient during battles 
They won’t attack some bosses, either. Generally they won’t attack the Rhino boss at the Oasis north of the Mitra trainer, nor the Rocknose King, and sometimes not the Treant at the gas pools either.