Source Tree Init Git Flow not taking in Custom Label for Develop and other branches

I tried initializing git flow in Sourcetree with custom label for develop and other other branches, but it doesn't work. The Flow initializes but it sets the label for the branches as the default ones.

Steps to reproduce:

Create a Local Git Repository using any mechanisms, in my case I used Sourcetree to create a local repository.

Then Click Repository Menu --> Git Flow / Hg Flow --> Initialize Repository

In the popup, change the text value for the branches as below

Click OK.

The development branch was created but the label was reset to the default label i.e. develop

Git Version

Sourcetree version