MailKit: MimeKit.ParseException: Invalid local-part at offset 0 on Gmail Imap

This just started getting an exception being thrown from inside of Imap.ImapFolder.Fetch() with my gmail account. See below.

I understand that local-part refers to the part to the left of the @ in the email address. With the Imap diagnostic turned on, i found a French language messages a few messages before the location with the stack trace. It that has this in the local-part:

From: =?UTF-8?Q?Lib=C3=A9ration?= <newsletter@liberation.cccampaigns.net>

The gmail “show original” shows it as

From: "Libération" <newsletter@liberation.cccampaigns.net>

Disclaimer: I’m guessing that this is the messages that’s causing the crash. I cant be sure since the parse and download streams appear to be on different threads.

This is the full stack trace:

MimeKit.ParseException: Invalid local-part at offset 0
   at MimeKit.InternetAddress.TryParseLocalPart(Byte[] text, Int32& index, Int32 endIndex, Boolean throwOnError, String& localpart)
   at MimeKit.InternetAddress.TryParseAddrspec(Byte[] text, Int32& index, Int32 endIndex, Byte[] sentinels, Boolean throwOnError, String& addrspec, Int32& at)
   at MimeKit.MailboxAddress.set_Address(String value)
   at MimeKit.MailboxAddress..ctor(Encoding encoding, String name, String address)
   at MailKit.Net.Imap.ImapUtils.EnvelopeAddress.ToMailboxAddress()
   at MailKit.Net.Imap.ImapUtils.ParseEnvelopeAddressList(InternetAddressList list, ImapEngine engine, String format, CancellationToken cancellationToken)
   at MailKit.Net.Imap.ImapUtils.ParseEnvelope(ImapEngine engine, CancellationToken cancellationToken)
   at MailKit.Net.Imap.ImapFolder.FetchSummaryItems(ImapEngine engine, ImapCommand ic, Int32 index)
   at MailKit.Net.Imap.ImapEngine.ProcessUntaggedResponse(CancellationToken cancellationToken)
   at MailKit.Net.Imap.ImapCommand.Step()
   at MailKit.Net.Imap.ImapEngine.Iterate()
   at MailKit.Net.Imap.ImapEngine.Wait(ImapCommand ic)
   at MailKit.Net.Imap.ImapFolder.Fetch(IList`1 uids, MessageSummaryItems items, HashSet`1 fields, CancellationToken cancellationToken)