Media folder created under wrong place

Description

Prerequisite: Access edit mode.

Steps to reproduce

1. Select folder A to create a new folder.
2. Enter a folder name "B" but DON’T press <Enter>.
3. Select to create a new folder from A. Name it "C".

Expected
A new folder "C" is placed under folder "A".

Actual
A new folder "C" is under "B" rather than "A".

Here is the video: https://www.screencast.com/t/i4HKBbtMsi
This is reproducible in 11.5.1 or earlier versions. From 11.5.2, it works well.