Doom Ultimate glitch?!?!

Im not so sure where to post this so I decided to post it here.



Is this a coincidence or what?

I was playing as Lifestealer and there was a doom bringer in the enemy team.

My items were Armlet of Mordiggian , Divine Rapier , Phase Boots, Sange and Yasha
Hand of Midas and [[desolator.

So I killed the ancient camp and the doom bringer came out of nowhere (due to Shadow Blade)
then he used lvl? death so I immidietly activated my Armlet of Mordiggian then he used
Doom just right after that. I wasnt scared because I had Divine Rapier so I almost beat
him to death and he used his Shadow Blade.
After that came the weird part I was looking at the Doom debuff in my screen and what I realized was it was refreshing. I was like wtf and then I died because instead of 15 seconds of
Doom the debuff kept refreshing after every 2 seconds and going back to 15 seconds.

I dont know if this is just a coincidence or it was due to my items or due to the
Armlet of Mordiggian activated

If Doom has Aghanim's Scepter and he stays next to you, the cooldown doesn't go down.

It's because of the Aghanim's Scepter. Aghanim's Scepter increases damage and duration. Duration doesn't count down while the target is within 900 range of Doom Bringer.