This happens to me as well. It happens when you put the Sea Horse racer back into inventory, and then place it back on the floor.

PinkCrayonCloud
Monobrow patient
3 months ago
Mar 24, 2025, 2:26:26 PM
Step by step of the bug
Step 1
Redesigning my museum
Screenshots

General information
Category
Sub-category
Gameplay
Features/Mechanics
Platform
Distribution
Game version
Xbox
Xbox Series S
Hotfix 1.2.177663
When placing seahorse racers, the seahorses disappear and guests get stuck in line waiting to use them. Tried rebuilding them, restarting, deleting and replacing, nothing works. It is on the aquarium level.