Question for Riot about Invulnerability interactions
So my question to any Rioter willing to answer is about like the title suggest is about Invulnerability interactions with champions that have them and why certain abilities still work on them but why ones that are similar don't example twitch poison D.O.T working on Vladimir in his pool but bands not or more specifically his passive detonation not damaging him while he is in pool since things that stay tethered to Vladimir like a malzahar ultimate or a fiddlesticks drain or like malzahar malefic visions is also an example I'm mostly just curious as to why brands passive detonation doesn't damage Vladimir at all when all of the other attachable D.O.T's do I guess Zilians Q also would qualify in this debate as well witch I think personally if things are "attached to the champion" before they use there Invulnerability ability should either disappear and truly be invulnerability or make all things that affect the champion before they go in there invulnerability state still damage them because it doesn't make much since when you think about it like take for example morgana ult it still stuns you even if your in zhonyas but yet other tethers just drop off when zhonyas is activated granted that morganas is an ultimate ability but when you put them side by side for comparison it doesn't make much since to me because where does one tether come off being better than the other besides the excuse of "it's an ultimate ability" there should be some context somewhere not just that's the way it is because reasons there should be some uniformity to abilities of similar nature somewhere instead of some line going all over the place there are to many inconsistencies when it comes to abilities such as these ones and can cause confusion among players as to what works and doesn't work.
Thanks for reading.