The fact the majority of iOS performs this way is a good argument for keeping the elastic scrolling.
For background, AnkiMobile explicitly disabled the elastic behaviour in the past, and that appears to have stopped working at one point - so it was a regression rather than a deliberate switch. I seem to recall the primary reason for disabling it was for the review screen, as page movement when a user tries to trigger a swipe gesture is distracting. I also seem to recall that at the time the change was originally made, iOS screens like the settings screen were not elastic, and thus having the bouncing made things feel less native - but my memory is hazy here, and I could be remembering incorrectly.
The change was prompted by this post:
This brings the behaviour in line with the desktop version - do you find the behaviour suboptimal there too? The animation was originally added to cover up MathJax/image loading pop-in, but those issues should be reduced now by pre-loading. Would you be able to provide a small sample deck that demonstrates the answer scrolling not working correctly?
I’ll look into the bottom margin issue, thanks.