Studio crashes when deselecting recently edited UI while Windows Magnfier is open

Roblox Studio crashes when you deselect a UI Instance (not UiComponent or LayerCollector) that’s been edited after selection, while Windows Magnifier is open.
This only happens in Studio on any place, and I discovered it on April 5th, 2021.


  1. Open Windows Magnifier with any zoom level, view, or behavior setting.
  2. Select one or more UI Instances that render on your screen.
  3. Use the Properties window to edit any property.
  4. Clear your selection suddenly, either by clicking the viewport or Explorer’s blank space.

This bug seems to happen 50% of the time this is done, and nothing seems to differ from an attempt that triggers the crash and one that doesn’t.

Crash log:
This is the place file I used to reproduce this crash: repro.rbxl (22.7 KB)
Video evidence:

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

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