Affects Version/s: Minecraft 1.13.2, Minecraft 19w08a, Minecraft 19w08b, Minecraft 19w09a, Minecraft 19w11a, Minecraft 19w11b, Minecraft 19w12a, Minecraft 19w12b, Minecraft 19w13a, Minecraft 19w13b, Minecraft 19w14a, Minecraft 19w14b, Minecraft 1.14 Pre-Release 1, Minecraft 1.14 Pre-Release 2
Fix Version/s: Minecraft 1.14.1
The return order for selectors is no longer consistent. I am unsure as to whether or not this is works as intended / invalid, as the default sort setting sort=arbitrary makes no promises regarding return order. However, prior to 19w08a, the return order would always be "oldest first".
To demonstrate this:
1. create a new superflat world without any entities.
2. Summon a chicken, cow, pig, and sheep, in that order
3. Run the following command: /execute as @e run say @s
If you do this in 19w07a, the output is always
However, if done in 19w08a, the output varies.