permission denied when ed25519 keys are used for rhcos node

Issue

• We are using ed25519 keys during OpenShift installation for the rhcos nodes and generating keys using.

 $ ssh-keygen -t ed25519 -N '' -f <path> 

• The bootstrap.ign includes the public key but once the boot finishes boot up, there is a permission denied message while accessing the node.

ssh core@x.x.x.x
core@x.x.x.x: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).