Throwing a grenade sometimes instantly downs me

[Reaper85]

Only really noticed it today, but it might be the problem ive had for a while with different perks. I used to get a bug from time to time where i would simply lose all my shields and over half my life for no reason, but back then i had defensive perks that may have stop me outright going down. So yesterday i changed to cloak/sniper build with no defensive perks and today im going down instantly when throwing grenades, only happens onceevery 10-20 minutes but it gets annoying to see your grenade fly towards your target only to instantly go from full shields and life to down with no enemy fire.

[Chaos 915]

What kind of grenades are you using?

Use Flash or Bio grenades if you keep getting hurt. At least they can't kill you.

I've really only been using flash and pyro grenades, and haven't been getting hurt for just throwing them. Though I do often get stuck in the range of my pyro grenades because of the bad/inconsistent throwing mechanics. It's often hard to tell where grenades will land, and I always seem to underestimate blast radius.

[Reaper85]

I use 0.0 second frags, but im certain they were not in my range, i dont see them explode near me, infact i see them fly towards where i want them, but the game acts as if they never left my hand and the damage is directed on me, like i said, its not all the time this happens.