Certificate E-Mail not set

[marcoSchr]

Description

I requested a new certificate from wiseid.
When importing this new certificate, mumble is unable to see the mail address and the server complains, that the certificate is not valid for my username.

When showing the certifiacte infos with openssl openssl pkcs12 -info -in certificate.p12 the information is the same for the old and the new certificate.
Here is what the wiseid webinterface displays

New Certificate

E=<mail address>
OU=Person's Identity not Verified - WISeID Free Certificates
CN=<mail address>

Old Certificate

EMail=<mail address>
CommonName=<mail address>
OrganizationUnit=Person's Identity not Verified - WISeID Free Certificates

Expected behavior

The imported certificate works like the certificates before, the server accepts it, as it uses the same CommonName and EMail.

Actual behavior

The new certificate only shows the CommonName in the UI, but the mail stays empty and the server declines it.

Steps to reproduce

1. create a new free certificate with wiseid: https://account.wiseid.com
2. Import the certificate in mumble

Mumble version

1.4.287

Mumble component

Both

OS

Linux

Reproducible?

Yes

Additional information

The relevant code is here: https://github.com/mumble-voip/mumble/blob/master/src/mumble/Cert.cpp#L86
From what I understand, this might not be an issue in Mumble, but might be an issue with qt.

Relevant log output

No response

Screenshots

No response

[Krzmbrzl]

Maybe related: #5929

[Krzmbrzl]

What Qt version are you using? (Can be found out via Help > About Qt)

[marcoSchr]

The Qt Version is 5.15.6 the archlinux package version of qt5-base is 5.15.6+kde+r180-1.

Here is the relevent server log:

Rejected connection from <ip>:<port>: Wrong certificate or password for existing user