seeing the bottom or not would also depend on the image scaling option in classic shell which could shrink the button to a smaller size
as for the glow effect, its cutoff is pretty visible actually from your screenshot, although a fading glow that far above the start menu means itl likely intercept clicks that are not meant for it
Hey IVO; if you see this, maybe you could set a transparency threshold, so any pixels over say 50% transparency are unclickable?, this would help with glow type sfx added on start buttons
(just a random thought, and not important enough to post an actual request
, but if its easy, it may be something to concider)