Adobe PDF Embed API | The display size of the Sized Container has been changed.

It seems that the display size of the Sized Container has been changed.

Previously, the uploaded PDF files were displayed fitting within the container, but at some point, they started to be displayed in an enlarged manner.

Does anyone know how to resolve this issue?

Customize Sized Container Embed Mode - Adobe PDF Embed API Demo

Even on the official page, a scrollbar appears, indicating that there seems to be a change in the specifications, but we have not received any notification about it.