For me. I used to be able open an image from a post, click share button and a preview of said image appears in messages. Now it is just a blank “content” preview that doesn’t send the image in question.

Same. Wasn’t sure if Voyager-related or a recent lemon.ee upgrade.

For what? wav is your lossless container. Pretty much universally recognized. Think of it like RAW for photos. ogg is lossy and more appropriate for most use cases, but is not universally recognized and not available on all devices.