when the grounds move for some reason, either by entering a gamemode that does that or other reasons, the practice bug fix doesn't take in account those movements. watch the video for an example https://youtu.be/HJOXZIF1QTg
it should also be noted that while most gamemode transitions only have a solid hitbox of the final destination of the ground, dual transitions have the hitbox move with the visual ground
when the grounds move for some reason, either by entering a gamemode that does that or other reasons, the practice bug fix doesn't take in account those movements. watch the video for an example https://youtu.be/HJOXZIF1QTg