Thanks it is now fixed on DEV branch

Here is a video showing it
https://www.youtube.com/watch?v=DUakOWnSDrs

here is a video demo of the flaw feature still exist in arma3 where you can damage a tank by shooting it on the track without letting shell fly through tank's main hull. https://youtu.be/WWFotzfjadE

Well in your video it is fired from the side, But my issue is that if you shoot the front side of a tank you can kill a t-100 by shooting it in the frontal track. I will upload a video, soon and link below.

Guys, on dev branch some tank seems to be fixed , such as the AFF faction MBT and M2A4 series, But T100 can still get one shot killed on the track.

Guys, Now it is fixed, in dev branch. No need to patch, but still the Track one hit kill problem is there, where you can damage a tank severely by shooting it on the track from the front or the back.

Yes the vanilla one, maybe I just need to turn on FSAA x2