Could not find any UI element to Heavy Attack with melee weapons. Looking at the Melee Combos menu seems to indicate there should be a separate icon to tap for Heavy Attacks, but it does not show anywhere.
In the Origin System, Operator/Drifter Abilities seem to be non-existent. When swapping to Operator/Drifter no abilities from the focus School appear.
In the Duviri Paradox, Drifter can properly use abilities, including a Heavy Attack, but do to the absence of a reload button, cannot overcharge the Sirocco Pistol. Additionally, while in Teshin's cave, Drifter can select Warframes/Weapons for their loadout, but cannot Configure the loadouts/mods of chosen weapons/warframes.
Lastly, I have found a bugged behavior with kitguns which have the Pax Charge Arcane equipped. Kitguns with this Arcane seem to have zero charge time, meaning they are able to be continually fired with out stopping. Upon reaching zero charge, the charge instantly resets to max, and the weapons continues to fire. Additionally, the ammo display on the UI shows a max ammo capacity of 200, though the weapon "reloads" to is maximum charge value. This applies to both the auto-fire and manual fire control schemes, I was unable to replicate this behavior with other battery type weapons (i.e. Fulmin Prime).
