Infernal cry buff effect

Hi,

I think infernal cry and warcry buff effect might be bugged:

I have a character with "Sione, Sun's Roar" specced and 105% warcry buff effect. The in-game tooltip shows that my infernal cry buff is giving me ~25% phys as extra fire. Considering the text on the infernal cry gem, I would have expected that number to be ~50%.
I did a quick test using trinity support to try and verify that this wasn't just a tooltip error -> I generate no resonance despite having attempted to set up suitable ele damage ranges and assuming that warcry buff effect applies to the infernal cry buff.

Posting to say that I noticed this problem as well, no matter how much extra buff effect I have, the tooltip number doesnt change past the 25% phys as extra.

Here is a video in case its due to some other factors that I may not have accounted for.

https://youtu.be/b3UehOOBczU

I have chieftain Sione, Sun's roar, and no other buff effects on tree (30% warcry buff effect), after using infernal cry, it goes up to 61,281 tooltip DPS.

After allocating more buff effect, (105% total warcry buff effect), I cast infernal cry again and the tooltip DPS is the same.