Email appears as txt attachment

Hi, please check my screenshot, you can see the same email but in different apps - native Mail app on the left and eM Client on the right.

eM Client shows the message as .txt attachment for some reason. How to fix that?

It looks like a multipart message which we don’t support in eM Client.

With multipart messages, we display the extra parts as attachments, and you can view them by double-click and opening with your OS assigned app for that filetype.

Is there any chance to implement this feature in a future version?
I sometimes have these display problems too.