Multipart/form-data no longer working for Post / Patch

I maintain some legacy code that makes calls to the management API using a content type of Multi-part/form-data.

On Wednesday afternoon all my POST and PATCH calls stopped working with the message “Unsupported Media Type”. I was able to rewrite these to use JSON and they began working again.

Is this a change Auth0 have made to their API and was there any notification of this? It makes sense to update these to use JSON but it caught me by surprise.

Does anyone else have experience of this or any information?