Inconsistent sprite behaviour with on wall settings

Arcade
#1

The sprite settings bounce on wall and destroy on wall have inconsistent behaviour when there’s no tilemap and the screen edge becomes an “implicit wall” in some cases:

  • sprites bounce off the edge of the screen with bounce on wall ,
  • sprites travel off screen and continue to exist with destroy on wall.

This can be seen in this small demonstration program where the cyan duck should die but makes a fleeting comeback proving there’s life after going off screen: https://makecode.com/_8tED843tp1ih

There’s also a change in behaviour from production beta to beta beta with a sprite with an acceleration value with is then later set to follow another sprite. Watch the green duck. Which one is correct?

#2

On reflection the following on 0.14.45 must be broken. I put in GH: microsoft/pxt-arcade: follow sprite behaviour looks broken in 0.14.45 and absence of unfollow block #1505 for this.