Studio Unexpected Hardcrash when stopping solo play

I’m currently working on a custom input handler for different controller types. With the input_mode script enabled in ReplicatedStorage->Client->scripts->interactions, stopping the test after selecting a controller type via the UI crashes studio. Line 354 of this script, which resets the Input Mode UI’s parent to the script is what causes the crash.

Demonstration of the crash: https://www.youtube.com/watch?v=PL1Wu17CSyg
System information: DxDiag.txt (132.6 KB)

Beta features: Aerodynamics, Dragger QoL Improvements, EditableImage and EditableMesh, Face Capture, Faster Play Solo, Grass Length Customization, In-experience CSG Improvements, Live Animation Creator, Luau Native Code, Material Generator, Multilayer Wrap Fix, New Audio API, New Studio Camera Controls, Notched Screen Support, Notification Overhaul, Terrain Editor UIListLayout Flex Features, Updated Docking System, Updated Roblox Controls, Upgrade Shorelines, Video Uploads

Bug occurs with Faster Play Solo disabled as well.

Reproduction Files (place in ReplicatedStorage):
bugged client.rbxm (45.4 KB)

Expected behavior

Studio should not crash when stopping the solo test.

A private message is associated with this bug report

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Thanks for the report! I filed a ticket in our internal database and we’ll follow up when we have an update for you.

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