Description field not accepted via API for post with image attachment
I'm using brid.gy to send posts from my website through to my pleroma account (my instance) and am experiencing an issue with posts which have an image attached, specifically those with alt text.
I raised an issue with the brid.gy dev: https://github.com/snarfed/bridgy/issues/975#issuecomment-694967670
After he applied a fix at his end, I created a post with image and alt text and from his logs he sees that the alt text was correctly attributed to the description property and accepted (200 response) but the description field in the response is empty and as such there was no alt text attributed to the image in the subsequent pleroma post.
I 2020-09-18 08:01:06.200521 requests.post https://social.nipponalba.scot/api/v1/media {'files': {'file': <urllib3.response.HTTPResponse object at 0x3eeb932d36d0>}, 'json': {'description': 'mug of coffee, partial shot of a boox ereader , notepad and pens.'}, 'headers': {'Authorization': '...'}} I 2020-09-18 08:01:07.925522 Got: {'description': '', 'id': '13144322', 'pleroma': {'mime_type': 'image/jpeg'}, 'preview_url': 'https://social.nipponalba.scot/media/c0a8cca5ef79d9104265c37098d88bebd9a2dd3dc8927db4469d39375001510f.jpg?name=file.jpg';, 'remote_url': 'https://social.nipponalba.sco
Is there a pleroma config option that I might inadvertently have enabled\disabled that could result in this behaviour or is it maybe a bug with the mastodon api or pleroma's implementation of it?
Thanks.