[Brightcolours]

Is that due to the angle perspective change caused by the shutter vibration?

I don't know what angle perspective change means.  :unsure:

 

I only know that the sensor has moved from its central position. You can see that clearly on the 2nd example with the red light in the backrgound, the bokeh disc gets cut off much more extreme (mechanical vignetting) even though the lens is the same and the position of the light in the frame is the same.

 

It is not the adapter that causes that.