This should now be fixed, thanks.
The same should then apply to the Sulphite gain when you open a map with sulphite scarab but actually run it/click it with another.
Yes, that should already work afaik.
It's a relic of the past per-character system and has no more reason to be this way. This needs to be changed.
I thought it was said that 4.0 would be playable at the event. Is that still the case?
In Champion, is the line " You and Allies affected by your placed Banners Regenerate 0.1% of Life per second for each Stage." improved by Aura Effect?
No, that is not part of the effect of the Aura - the aura does not grant this bonus.
For contrast, compare to the wording on some Ascendancy notables "Auras from your Skills grant..." which adds an effect to the aura. This means it's part of the aura's effect and will be scaled as such (it also means it's applied by each aura, so if affected by multiple such auras, they each apply that bonus).