I don't know if it's a bug, but it is not possible to copy/paste from Settings -> Album description. As you can see, the menu is there, but nothing is saved ind the Clipboard. It's not a disaster, because when I exit the HTML editor, I can copy from there - and get the HTML code at the same time.
I'll check with Laza whether there is a fix for this. The html editor is implemented in JavaScript using the Squire library. All relevant files are located under the system folder (editor.html, squire.js and sqire-raw.js)
I tried updating the Squire library, but the bug is probably within the embedded browser. It's hopefully addressed with a Java update, but before we can go with Java 17 we have to switch JavaScript engine.