When connecting to Pop3 server with Mailkit, connection fails every other time - ssl

Question

I'm trying to write some code to retrieve the e-mails stored in the pop3 mailbox hosted at a third party email provider using Mailkit (version 2.1.0.3). When attempting to connect to the mailserver, the connection fails every other time with the error:
"An error occurred while attempting to establish an SSL or TLS
connection."
With inner exception
"Authentication failed because the remote party has closed the transport stream."
So the code above on the first attempt succeeds, and on the second attempt fails with the error mentioned above. This happens without fail, and always fails the second time I try. This leads me to believe there is something wrong with terminating the connection.
Here is the code I use to set up a connection.
using (var client = new Pop3Client())
{
await client.ConnectAsync("pop3.**.nl", 995, true); // FAILS HERE
await client.AuthenticateAsync("**username**", "**password**");
for (int i = 0; i < client.Count; i++)
{
...
}
await client.DeleteAllMessagesAsync();
await client.DisconnectAsync(true);
}
I already attempting resolving the issue using the following functions, however, none of them helped. However changing the SSL protocol to version SSL3 and SSL2 caused the error to appear at every connection attempt, instead of every other one.
client.ServerCertificateValidationCallback += (e, r, t, y) => true;
client.SslProtocols = SslProtocols.Tls12;
client.CheckCertificateRevocation = false;