Vengeful Trickster ephemera intensity varies wildly between different helmets

[Danivus]

For example super intense:

 

compared to quite subtle:

 

 

[Danivus]

Additionally, when playing Wisp the ephemera will randomly stop working and not come back until you die. Unable to replicate with any specific action. 

Edit: Seems to be rapidly bullet jumping that causes it. 

[TDK_Necron1992]

i find the ephemera seems to disappear on warframe with invisibility. wisp with her jumps and will o wisp, ivaras prowl are the two i find do it all the time.