Sugarrush is not detecting the mooshroom she is intended to ride

[1.13]
Partner Rank:
1

Partner Team Reporting:
Everbloom Studios

Verification builds: 1.13.0.2

Summary: Sugarrush (bat) is not detecting the invisible mooshroom she is intended to mount and track.

Impact: Map is unplayable

Repro Steps:
Open up a fresh copy of A Nightmare in Candyworld and Enable cheats.
Double press the “SUPER EASY” button.
Sprint forward and double press the button on the far wall.
Watch the game intro
After you get your equipment, go into creative mode with /gamemode 1
Type /kill @e[type=husk]
Type /kill @e[type=zombie]
Switch to /gamemode 2
Type /tp 12 139 -529
Run forward onto the platform past the door (surrounded by quartz) wait till you are dropped into the sewers
Type /tp 10 54 -503
Verify behavior

Observed Results: NPC Sugarrush is not mounted on her mooshroom.

Expected Results: Sugarrush should “fly” and guide the player around the map on the back of an invisible mooshroom.

Screenshots/Videos attached:
Yes

Regression Builds: 1.12.0.27