Overflow: When you use an impulse that has the overflow trait, your kinetic aura deactivates until you revitalize it (typically with Channel Elements).
The question is does the aura deactivate before or after that overflow impulse? This is very important because aura can add benefits to the impulse. Also there are aura-affecting stances which presumably end along with the aura - I'd appreciate a confirmation on this.
The most typical case would be Fire Aura Junction and any damaging Fire Overflow Impulse. Would the fire damage from the overflow impulse trigger the weakness granted by the aura? If not the fire aura junction is borderline useless because there is a LOT of such impulses - more than non-overflow ones in fact.
More extreme case is Steam Knight which lets you deal damage when you Leap over a creature. Leap action can be granted by Lava Leap and Volcanic Escape both of which are Overflow meaning they would end the aura and presumably Steam Knight along with it. If the aura is still active for Lava Leap and Volcanic Escape than these impulses could also trigger Steam Knight damage and both the Lava Leap / Volcanic Escape damage and the Steam Knight damage could trigger the aura weakness. But if the aura and stance end before the overflow impulse, none of it happens.