credentialHelperSelector keep poping in 2.28 using windows identity story

Hello,

I have some trouble when migrating from 2.27 to 2.28. here is my bugreport :

What did you do before the bug happened? (Steps to reproduce your issue)
I migrated from 2.27.0 to 2.28.0

What did you expect to happen? (Expected behavior)
I connect to a https bitbucket server (ssl is blocked). For This, I
stock my login/token in the windows identity store. Here, I have my
server address as :
https://bitbucket.server
login: User
password: token
So I use credential.helper manager. To trust the certificate, I need
to set the http.sslBackend = schannel, or I face the error "SSL
certificate problem: unable to get local issuer certificate".
When I do a "git pull" I'm supposed to have a line :
$ git pull
Already up to date.

In the windows identity store a new entry is created with server address :
https://User@bitbucket.server
login:User
passwod: ?? (maybe my token)

What happened instead? (Actual behavior)
Instead, I have a strange behaviour where the
"credentialHelperSelector" keep poping 2 times with the line :
$ git pull
error: key does not contain a section: -
error: key does not contain a section: -
Already up to date.

Everytime I do a git pull or anything that needs to ask the server, I
have these 2 popups again and again and the error.


What's different between what you expected and what actually happened?
Normally, I used to set the credentialHelperSelector to manager once
for all and never ask again for it. I did this in version 2.20 a long
time ago and did not have this popup for a long time since now.
I don't see the error key does not contain a section: -

Anything else you want to add:
Yes, by removing the new created entry in the windows identity store
(https://User@bitbucket.server), there is still the 2 popups but no
more error 'key does not contain a section: -'

For the same .gitconfig file, it doesn't give the same result between
version 2.27 and 2.28.
Returning back to 2.27, no more popups, everything works fine.

Here is a part of my .gitconfig
[color]
    ui = auto

[core]
    autocrlf = input
    eol = lf
    longpaths = true

[http]
    sslBackend = schannel
    postBuffer = 4096000

[credential]
    helper = manager


Please review the rest of the bug report below.
You can delete any lines you don't wish to share.
[System Info]
git version:
git version 2.28.0.windows.1
cpu: x86_64
sizeof-long: 4
sizeof-size_t: 8
shell-path: /bin/sh
compiler info: gnuc: 10.2
libc info: no libc information available
[Enabled Hooks]

Best regards,

Yohan de Oliveira