Weapon Merc Aura Bug

Is it possible that the Aura provided by Insight is bugged (Meditation)? I have created an offline Hammerdin with an act2 mercenary equipped with Insight (lvl 17 med aura) and i ran out of mana when casting hammers

In Retail i have the exact same Hammerdin and Insight and the Mana sphere barely moves.

I have tried with Infinity but it’s working correctly so my guess is something related to Insight specifically.

Anyone else encountered this issue?