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Stale window frame visible through transparency after fullscreen virtual-desktop switch on Windows 11 #9739
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area:ui-frameworkCore Warp UI framework, rendering, layout, and windowing infrastructure.Core Warp UI framework, rendering, layout, and windowing infrastructure.area:window-tabs-panesWindow, tab, pane, and workspace layout management.Window, tab, pane, and workspace layout management.bugSomething isn't working.Something isn't working.needs-infoMore issue-specific reporter detail is needed before the problem can be confidently triaged.More issue-specific reporter detail is needed before the problem can be confidently triaged.os:windowsWindows-specific behavior, regressions, or requests.Windows-specific behavior, regressions, or requests.repro:mediumThe report suggests a plausible repro path, but some uncertainty remains.The report suggests a plausible repro path, but some uncertainty remains.triagedIssue has received an initial automated triage pass.Issue has received an initial automated triage pass.
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area:ui-frameworkCore Warp UI framework, rendering, layout, and windowing infrastructure.Core Warp UI framework, rendering, layout, and windowing infrastructure.area:window-tabs-panesWindow, tab, pane, and workspace layout management.Window, tab, pane, and workspace layout management.bugSomething isn't working.Something isn't working.needs-infoMore issue-specific reporter detail is needed before the problem can be confidently triaged.More issue-specific reporter detail is needed before the problem can be confidently triaged.os:windowsWindows-specific behavior, regressions, or requests.Windows-specific behavior, regressions, or requests.repro:mediumThe report suggests a plausible repro path, but some uncertainty remains.The report suggests a plausible repro path, but some uncertainty remains.triagedIssue has received an initial automated triage pass.Issue has received an initial automated triage pass.
Summary
When using Warp with window transparency on Windows 11, entering fullscreen (F11), switching to a different virtual desktop (Win + arrow), and returning causes a stale window frame to appear behind the terminal content. The frame persists until Warp is restarted.
Problem
With window opacity set below 100% (transparency enabled, Acrylic off), the transparent Warp window renders correctly in both windowed and fullscreen modes under normal use. However, after switching virtual desktops while in fullscreen and switching back, a background window frame becomes visible through the transparent content area. The artifact does not clear on its own and cannot be dismissed by toggling fullscreen, minimizing/restoring, or resizing — only a full restart of Warp resolves it.
Expected behavior
The fullscreen transparent window should re-render cleanly when returning to its virtual desktop, with no stale frame or visual artifacts visible through the transparent background.
Actual behavior
A window frame from a prior render state becomes visible behind the terminal content after the virtual-desktop round-trip. The frame persists indefinitely until Warp is restarted.
Reproduction steps
Artifacts
None attached.
Warp version
v0.2026.04.27.15.32.stable_03
Operating system
Windows 11 (Build 10.0.26200.8246)