Rider high CPU and GPU usage when viewing ".http" files

Windows 10, Rider 2024.2.2, Blazor 8 project. Inside the project, there are ".cs" files and ".http" files, among others. When an ".http" file is open in editor, the CPU usage is maintained at about 50% and GPU at about 20% constantly, just for viewing the file, not typing. When a ".cs" file is open, the CPU usage is at about 7% and GPU at 3% for viewing, which is normal for Rider.

Why is CPU usage so high when viewing a ".http" file?

I wanted to attach an animation showing the constant high usage of CPU and GPU when switching to “.http” file in editor, but mp4 is not accepted and gif of 2.3K failed to upload. So here is a screenshot: