diff --git a/internal/uidriver/glfw/ui.go b/internal/uidriver/glfw/ui.go
index 1506673c7..7656fdda4 100644
--- a/internal/uidriver/glfw/ui.go
+++ b/internal/uidriver/glfw/ui.go
@@ -827,6 +827,10 @@ event:
 		// manager), glfw sends a framebuffer size callback which we need to handle (#1960).
 		// This event is the only way to handle the size change at least on i3 window manager.
 		u.defaultFramebufferSizeCallback = glfw.ToFramebufferSizeCallback(func(_ *glfw.Window, w, h int) {
+			if u.isFullscreen() {
+				return
+			}
+
 			// The framebuffer size is always scaled by the device scale factor (#1975).
 			// See also the implementation in uiContext.updateOffscreen.
 			s := u.deviceScaleFactor(u.currentMonitor())