Encrypted Messages Sent From Larksuite Mail Shown As Files in Chat

Delta Chat Version
Delta Chat Desktop 1.52.1 (git: v1.33.0-1337-g28145051-prepare-release-1.52.1)

Expected Behavior
Encrypted messages I send should appear in the same format as messages received from others.

Actual Behavior
On the recipient’s side, encrypted messages I send appear as two separate files: “noName” and “encrypted.asc.” Additionally, when I send messages to myself via “Saved Messages,” they are also displayed as files on my other devices.

Screenshots


Encrypted message sent by me and a reply received from the other side.


The recipient’s view showing my encrypted messages as two files.


Messages sent to “Saved Messages” on my phone appear as files on my PC.

Additional Context
I have the same account set up on both my phone and PC. When I send messages to “Saved Messages” on my phone, they appear as files on my PC. The problematic account uses Larksuite’s mail service, which is similar to Zoho. I’ve tested accounts with providers listed here, and they work as expected. However, I’m still troubleshooting this issue because that particular email address using Larksuite’s custom domain email service serves as my primary contact. Thanks in advance for any help or tips!