Lucifer, Stay. Good Devil. - S1-E2
Factual error: The apple scene (as it often happens with Amenadiel's scenes) does not make much sense: ignoring the fact that the liquid in the glass suffers no slowdown (we can assume that being in Lucifer's hand somehow protects it), the apple is already on its descending arc when the two are talking by the piano, but is still up there well after a minute. By the speed it moves, it should already have fallen. Also, why would it drop vertically and not continue its trajectory? (00:13:50 - 00:15:50)
Answer: As Cain theorises in a later episode, it's Chloe's love, not presence. This early on, Chloe had no strong feelings for Lucifer, so had no effect on his immortality. In fact even more recently he's back to being invulnerable around her after speculation that he chose to let himself be vulnerable. So while there's a degree of flexibility / retconning going on, it's all explained in-show.
Jon Sandys ★