Microsoft Edge - Window Titlebar single click issue

On Linux systems running Wayland,  Microsoft Edge Stable  exhibits incorrect titlebar click behaviour. When the window is maximized, a  single left-click  on the titlebar incorrectly triggers a  restore-to-windowed-state  action. When Edge is in a normal (non-maximized) state, single-clicking the titlebar causes  unintended small positional movements , as if a drag or snap gesture were initiated.

This behaviour does  not  occur in Firefox, nor did it occur in older Edge releases . It appears specifically when Edge is using Chromium’s client-side window decorations under Wayland.

Attempts to configure Edge to use system (server-side) titlebars — including the UI toggle (“Use system title bars and borders”), launcher flags (`--force-system-title-bar`, `--gtk-version`, `--enable-features=WaylandWindowDecorations`) and `.desktop` override configuration — do  not  resolve the issue.

This suggests a  hit-test / event-targeting regression  in the Chromium Wayland + CSD (client-side decoration) path.

 Additional Notes 

This matches the known open Chromium issue regarding  misaligned hit-test regions in GTK4 CSD under Wayland . Since Edge now defaults to GTK4, the incorrect click detection is being triggered before compositor-level decoration logic applies.

Firefox, which uses server-side GNOME decorations under Wayland, does  not  exhibit this behavior.