asp.net – Visual Studio 2019 while opening aspx file, code is not displaying at first time

I just installed Visual Studio 2019 Enterprise and Telerik Web UI components.

When I opening a aspx file, page is not loading. After I switching to another page or another app and switch back to that file code is displaying in that time. This is only happening to .aspx files. While aspx.vb or aspx.cs pages are loaded correctly.

This is how it looks;

I repaired Visual Studio but problem contiunes.
What may causing this to happen? I couldn’t find a solution by myself or online.

I observed that it happens on my second monitor, when I switch the VS to my laptop’s main screen it is not happening.

Which options should I close for solve this?