Thanks for trying. I can definitely say it's not the receiving program, first because it's Mac Mail, last version of Mojave 10.14.6. Normally it copies fine text + images either by copy-pasting or by dragging. This method of copy-paste and dragging works fine from and to Notes, Mail, Pages on Mac. But from Evernote it does not work to either Mail or Pages or Notes.
Something in Evernote changed from the Legacy version. I can tell you what: In the old (legacy) version, when I click on an image, a light blue stroke shows around the image with a little square bottom right. Now in the NEW version, there is also a light blue stroke, but also a "menu" above the image proposing to edit the image. That may be the problem. I attach a screenshot of that image in the new version which apparently does not allow to copy or drag it to another program. In the old version there is no such "edit" menu on top of the image when you click on it. The images are there in both version, but in the new one, that "edit menu" does not allow to copy-paste. Maybe this info will help you find the problem...