Just tried to configure 1Password SSH and am having trouble (Windows 11)

I am experiencing similar problems.
* 1Password for Mac 8.6.0 80600081, on BETA channel
* 1Password for Mac 8.7.0 80700002, on BETA channel

Created Ed25519 key for GitHub in 1Password and set IdentityAgent in ~/.ssh/config.
(There are no other settings in ~/.ssh/config).
And ssh -T git@github.com succeeded.

Next, a key was created with RSA (4096 bits) to connect to another host.
ssh user@my-host and was prompted to unlock by Touch ID, but could not connect.
When the -vT option was enabled, the following log was displayed.


...
debug1: Will attempt key: GitHub SSH chatii ED25519 SHA256:{} agent
debug1: Will attempt key: insprout ProxyServer chatii SSH Key RSA SHA256:{} agent
...
debug1: Authentications that can continue: publickey
debug1: Offering public key: my host RSA SHA256:{} agent
debug1: Server accepts key: my host RSA SHA256:{} agent
sign_and_send_pubkey: signing failed for RSA "my host SSH Key" from agent: agent refused operation
...
debug1: No more authentication methods to try.
user@myhost: Permission denied (publickey).


To find out where the problem lies, copy the private key generated by 1Password to ~/.ssh/my-host and try ssh -i ~/.ssh/my-host user@myhost - this method works.

I have also tried disabling and enabling the SSH agent in 1Password and upgrading (8.6.0 => 8.7.0), but this does not fix the problem.