scrolling: Previously displayed window shows/flickers on empty desktop in multi-monitor setup

[noctuid]

hyprwm/hyprland-plugins#488 still consistently happens for me after switching to the builtin scrolling layout.

Reproduction steps:

• Enable scrolling layout
• On monitor 1, focus workspace 1 with a window
• On monitor 2, focus workspace 2 with no windows/empty
• On monitor 1, switch back and forth between workspace 1 and 2 (may need to call multiple times) so that they swap between the two monitors; I have keybindings for these:
  • hyprctl dispatch focusworkspaceoncurrentmonitor 2
  • hyprctl dispatch focusworkspaceoncurrentmonitor 1

Very quickly (often the first time) if I do this, I will see the window appear on both monitors. On the monitor that has workspace 2, which should be empty, it may flicker, partially showing the window that used to be displayed and partially showing the background/wallpaper.

My scrolling config:

scrolling {
  # default; automatically scroll
  follow_focus = true
  # fit to bring into view, don't center
  focus_fit_method = 1
  # default width (like monocle but better)
  column_width = 1
  fullscreen_on_one_column = true
  explicit_column_widths = 0.333333, 0.5, 1
  # default; new windows right
  direction = right
}

Tested with laptop as one screen and external monitor as other. The issue happens on both monitors.