Part of submitted, unreleased map broken in 1.16 (FlyAroundAnchor goal not being removed)

Partner Rank: 2

Verification builds: 1.16.60
Regression builds: 1.14.6005

Summary: A certain part of a recently submitted map is broken in 1.16, making it unplayable. Details posted in slack.

Impact: Map will not be completeable in 1.16

Repro Steps:

1. Download and open the world from slack.
2. Follow the instructions in slack.

Expected Results: Same results as 1.14.

Observed Results: Mechanics are broken.

Screenshots/Videos attached: Yes, in slack.