Bug regarding Fist of War support gem

Fist of War when equipped on Rolling Slam doesn't display the correct AOE radius.

Rolling Slam when Ancestrally Boosted by Fist of War:


Rolling Slam when Fist of War is on cooldown or unequipped:


As far as I can tell, the actual AOE radius is the same, but the visual does not display the actual radius. Very confusing. Also confusing because none of my other abilities behave this way. They display the correct radius even when the Ancestral Boost from Fist of War is active.

Reposted from another thread that I mistook to be the official bug reporting thread