Related https://github.com/abpframework/abp/pull/22419
Resolves #19562

The client has to set the Prompt to select_account when redirecting to the OAuth2 server.

.AddAbpOpenIdConnect("oidc", options =>
{
    // ...
    options.Events = new OpenIdConnectEvents
    {
        OnRedirectToIdentityProvider = redirectContext =>
        {
            redirectContext.ProtocolMessage.Prompt = "select_account";
            return Task.CompletedTask;
        }
    };
    // ...
});

9.2.0-rc.1 25 March, 2025 abp-module-account