Attachments not send when using AppleIGC in Apple Mail under macOS Ventura

[5T33Z0]

I've noticed that if I send an E-Mail with an attachment (in this example it was a .m4a audio file), the attachment was not delivered with the E-Mail when using AppleIGC.

As soon as I pressed "send", I immediately got the "mail send" whoosh sound, but I saw no progression bar in the outbox. Ususally, this sound is only triggered after an E-mail is send. And since the audio file is a couple of MB in size, the transfer definitely takes longer than the tenth of a second it takes to send a text-based email.

After deactivating AppleIGC and using the regular com.apple.DriverKit-AppleEthernetE1000 driver, the attaachment was sent successfully the next time I tried.