#19002·Avalonia

WebBrowser app blank on startup when running via a debug session

Author: DanielPamichCreated Jun 5, 2025Updated Sep 14, 2026
Labelsbugos-browser

Describe the bug

When starting from Rider(on MacOS) a web browser debugging session, the web app will display the flash screen, but then it will go completely blank.

If you go into the developer tools or resize the window, the application will then show. I've got this to occur with chrome and edge. I cleared the app cache, etc to make sure there was no existing assets that were causing issues.

If I go to the URL directly and not via a debug session, it displays okay. Issue only occur when starting vai Rider

To Reproduce

Start a web browser debug session with Rider , MacOS and Chrome (arm version). A blank screen displayed until browser window is manually resized.

Expected behavior

To see "Welcome to Avalonia" to display.

Avalonia version

11.3

OS

macOS

Additional context

No response