Ghast will follow you (after riding) even when the behaviors are removed to stop it doing that

Partner Rank: 3

Partner Team Reporting: Jigarbov Productions

Verification builds and Platforms: 1.12.0.28 & 1.13.0.10 Minecraft - Release_2983494

Summary: Ghast will follow you (after riding) even when the behaviors are removed to stop it doing that

Impact: There are existing maps on the store that change behavior of ghast in this way and they suffer as a result, Solar 2 being an example. In addition when behaviors don't work as expected this reduces trust in Minecraft systems. Has also resulted in low ratings.

Repro Steps:

1. Open the repro world "Ghastly issues"
2. Right click to ride the ghast
3. get off the ghast
4. walk away from the ghast

 

Observed Results: Note during step 3 and 4 the ghast will spin frantically trying to follow you. Once you are out of its hitbox it continues to follow you a bit.

Expected Results: The ghast has push_through and as a result, the ghast shouldn't be movable. In addition, it also shouldn't move or follow the player when they get off. There is nothing in the behavior that allows that.

Screenshots/Videos attached: 

https://www.youtube.com/watch?v=xqTX25TD7Ew&feature=youtu.be https://www.youtube.com/watch?v=0oAFxWcSIYs&feature=youtu.be

Regression Builds: Never worked. Tested as far back as 1.8