Expected behavior

I expected the same fluency while expanding and collapsing the sidenav than we have in previous MDB versions.

Actual behavior

There is a minimum "jump" when expanding and collapsing the sidenav. This error in performance appeared with the new MDB version 6.0.0. In addition, the < hr > border is different too. In this new version the line is different. Almost I can't see it. However, this could be changed in CSS by myself, no problem.

Resources (screenshots, code snippets etc.)

I'm sharing with you a video with the following steps:

1. It begins with the previous version 5.0.0 where you can see the correct fluency in the slim sidenav.
2. I remove MDB files from project and paste the new ones from version 6.0.0.
3. Compiling the code.
4. Refreshing the page to see the changes.

You can download the video (~53MB) from: https://we.tl/t-7fg0OQqcvV

Thank you.