ssh-agent certicates not loading id

"OpenSSH for Windows" version
7.7.2.1
Client OperatingSystem
Windows 10 Home 1809
What is failing
When I have both a cert and a id eg like
id_rsa
id_rsa-cert ( ecdsa versions )
it says loaded eg
ssh-add
It says added Key and Cert

Identity added: C:\Users\Asus/.ssh/id_rsa (C:\Users\Asus/.ssh/id_rsa)
Certificate added: C:\Users\Asus/.ssh/id_rsa-cert.pub (vault-root-:xxxxxx)

BUT only adds the cert

PS C:\Users\Asus> ssh-add -l
2048 SHA256:Em8Fxxxxxxx C:\Users\Asus/.ssh/id_rsa (RSA-CERT)

if I do this in Ubuntu even on WSL it works as expected even with older versions of openssh

Expected output
ssh-add -l
2048 SHA256::Em8Fxxxxxxx /home/craig/.ssh/id_rsa (RSA)
2048 SHA256::Em8Fxxxxxxx /home/craig/.ssh/id_rsa (RSA-CERT)

Actual output
PS C:\Users\Asus> ssh-add -l
2048 SHA256:Em8Fxxxxxxx C:\Users\Asus/.ssh/id_rsa (RSA-CERT)

Any ideas while on native version is does not work ?

Reproduce the report on native OpenSSH for Windows 7.7.2.1 using an id_rsa key and matching id_rsa-cert.pub, then compare ssh-add output with ssh-add -l. Done means ssh-add -l lists both the RSA identity and its RSA-CERT entry, as shown in the expected output.