Media upload from the post edit screen shows an inaccurate number when uploading multiple media files - first time

[jadavsanjay]

Issue facing while first time on load
When uploading multiple media files from the Edit Post screen via “Set featured image”, it displays incorrect numbers.

Steps to reproduce:

Create a new post.
Click on "Set featured image."
Go to "Upload files" and upload multiple files.
Notice that the numbers are inaccurate (you may need to repeat step 2 multiple times to reproduce the issue).

​https://postimg.cc/phJzhGt5

Video

​https://drive.google.com/file/d/1g3MeCH_iLkB6hzdl5Q2svmmWrsnMrjdx/view?usp=sharing

[wildworks]

Duplicate of #65053.