Rectangle Border Issue in Frameless Wails App on macOS

[SusannaJung]

Hi everyone,

I'm experiencing an intermittent issue in my Wails app (on macOS, with frameless mode enabled). Occasionally, a rectangular border appears around the webview, and it doesn't happen consistently. Sometimes this happens after opening and closing a dropdown, or the border shows up at the edges of the webview itself.

This doesn't happen every time, but when it does, it creates a rectangular outline at different places. I'm unsure if this is a rendering bug or something else.

Has anyone experienced a similar issue or have any suggestions on how to resolve this?

Thanks in advance for your help!

opts := &options.App{
		Title: konst.Name,
		Menu:  appMenu,

		AlwaysOnTop:       false,
		Frameless:         true,
		Fullscreen:        false,
		StartHidden:       false,
		HideWindowOnClose: true,
		DisableResize:     false,
		MinWidth:          1200,
        MinHeight:         850,
        Width: 1200,
        Height: 850,

		BackgroundColour: &options.RGBA{R: 0, G: 0, B: 0, A: 0},
		WindowStartState: options.Normal,

		AssetServer: &assetserver.Options{
			Assets: assets,
		},

		Logger:             log.FE(),
		LogLevel:           logger.TRACE,
		LogLevelProduction: logger.INFO,

		OnStartup:     onStartup,
		OnDomReady:    onDomReady,
		OnBeforeClose: onBeforeClose,
		OnShutdown:    onShutdown,
		Bind: []interface{}{
			new(foundation),
			new(app),
			new(llm),
			new(history),
			new(stt),
			new(polling),
		},
		EnumBind: []interface{}{
			enums.AppClickEvents,
			enums.LLMSenders,
			enums.LLMCategories,
			enums.LLMStatuses,
			enums.MeetingNoteActions,
			enums.MeetingNoteStatuses,
		},

		SingleInstanceLock: &options.SingleInstanceLock{
			UniqueId: "ccdf60e4-7e72-41fe-973b-3c5e4c137e16",
			OnSecondInstanceLaunch: func(_ options.SecondInstanceData) {
				emitAppClick(enums.AppClickOpen)
			},
		},
		Experimental: &options.Experimental{},

		Windows: &windows.Options{
			OnSuspend: onSuspend,
			OnResume:  onResume,
		},
		Mac: &mac.Options{
			WebviewIsTransparent: true,
			WindowIsTranslucent:  false,
			Preferences: &mac.Preferences{
				FullscreenEnabled: mac.Disabled,
			},
		},
	}