The Shattering Harmonics armor has 2 buffs for melee damage on it. When equipped it applies the 1st melee buff but not the second. The second buff seems to apply about every 4 seconds for less than 0,5 sec or less. Same thing keeps happening on all melee weapons, unarmed combat, kit modules.
Comments
I think it's a leftover from the Gear Upgrade system.
The Armor used to grant a flat +20% Melee Damage, and now it scales with item level/rarity.
From the behaviour you describe, I strongly suspect that the +Melee Damage on the armor is coded as a self-refreshing buff with a short duration - and they've accidentally allowed this buff to overlap with itself.
As an aside... have you looked at the Counter-Command Exo-Armor? It plus the Shattering Harmonics Personal Shield would probably work out a bit better than the 3-piece SH set unless you specifically need Environmental Suit protection. (Particularly if you're using it on your Captain since you can take the CC Weapon and/or Kit as well for the extra set bonuses...)
So why isnt it fixed yet? That is the only enviromental suit i know of, except the lobi paladin/sentinel suits, that gives severety and physical dmg.