[confirm]responding to ETB triggers

[Torque]

Describe the Bug:
When I cast Swords to Plowshares on a creature in response to its "enter the battlefield" effect (e.g. that of Angel of Despair), the card appears to be exiled to the top of my deck. On my next turn, my first draw is that creature even if it was not a part of my deck.

Which card did behave improperly?
Swords to Plowshares

Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
March 2021 - Allegiances and Alliances, duel

What exactly should be the correct behavior/interaction?
Exiled cards should not go to my deck.

Are any other cards possibly affected by this bug?
I have not tested this with other instant-speed exile effects, but possibly all of them? Path to Exile is another obvious example.

[Aswan jaguar]

This is not going to work correctly unless we can have triggers go on the stack.
You are allowed to target Angel of Despair in fact while it's entering the battlefield before it's trigger go on the "stack" which you should not be allowed to do that both in Manalink and in a real game, too. The work on countering triggering abilities has allowed this kind of bug. If you notice this way Angel of Despair trigger never resolved in fact never targeted a permanent while it should have.

Some more info on responding to triggering effects and Manalink 3.0 here by Korath back from 2013 which still mostly apply ( though now countering triggering abilities mostly work ) :
viewtopic.php?f=86&t=4134&start=495#p121034