microsoft / microsoft/PowerToys

FancyZones crashes when using Shift key to activate zones

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Issue-Bug Needs-Triage Product-FancyZones
Dominant language
C
Stars
139k
Forks
8.6k
PR merge metrics
PR metrics pending

Description

Microsoft PowerToys version

0.92.0

Installation method

GitHub

Area(s) with issue?

FancyZones

Steps to reproduce
  1. Update to 0.92.0 (Does not reproduce in earlier versions and does reproduce on following versions)
  2. Enable FancyZones and "Hold Shift key to activate zones while dragging a window"
  3. Drag a window while holding Shift key.
✔️ Expected Behavior

Zones are being showed and window snaps to them.

❌ Actual Behavior

FancyZones shows zones layout for a second, then "crashes" and becomes unresponsive (Layout editor and the rest of functions) until FancyZones is toggled in PowerToys.

https://github.com/user-attachments/assets/9c7c431a-c5b6-4c58-907c-ff817ed5026d

Upload Bug Report ZIP-file

PowerToysReport_2026-04-08-13-57-48.zip

Additional Information
  • OS Name Microsoft Windows 10 Pro
  • Version 10.0.19045 Build 19045
PS C:\Users\Admin> dotnet --list-runtimes
Microsoft.NETCore.App 6.0.31 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.31 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.13 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  • System installation
  • Running as admin

My tests showed next results:

  • Layout editor fully works
  • Disabling built-in windows snap does not fix the issue
  • Using "Override Windows Snap" feature does not crash FancyZones and allows to snap windows using keys
  • Problem does reproduce with different display setups (1-3 displays, different resolutions, with and without amd vsr)
  • Problem does not reproduce on versions from 0.88.0 up to 0.91.1
  • Problem does reproduce on latest version
Other Software

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the crash in FancyZones on PowerToys 0.92.0 using the listed Windows 10 setup and the Shift-to-activate-zones option. Compare behavior with versions 0.91.1 and earlier, and inspect the uploaded PowerToys report ZIP for the failure details. Done means dragging with Shift shows zones, snaps the window, and leaves FancyZones responsive.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
desktop
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
45/100

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