Problem in main viewport/window

I’m a beginner. My wall run in the main viewport is normal, but when I run it over the open blueprint in the window, wall run movement speed drops and moves jerkily. - YouTube
What could be the problem?

when I run it over the open blueprint
in the window

That’s the reason. BP Debugging consumes lots of resources, and when debugging is enabled in a blueprint, especially if it’s a large one, fps may drop drastically, hence buggy movement. You can enable “stat fps” and see for yourself.

Please make as solved if the answer worked.

Regards

Thanks for the quick response. You helped me very well.