Error with Vision request

[drosos-kal]

  ChatClient client = new("gpt-4o", apiKey);
BinaryData binaryDataImage = new BinaryData(byteImage);
List<ChatMessage> messages =
[
    new UserChatMessage(
    ChatMessageContentPart.CreateTextPart("If you detect itinerary information describe details for all trips depicted. Details include 
    origin, destination, date and time, seat class, passenger names). If there are no itineraries reply with blank. Do not assume any 
   details not explicitly mentioned."),
    ChatMessageContentPart.CreateImagePart(binaryDataImage, $"{mediaType}"),

];
ChatCompletion completion = await client.CompleteChatAsync(messages);

var response = completion.Content[0].Text;

This code block returns this exception on CompleteChatAsync:

System.ClientModel.ClientResultException: HTTP 400 (invalid_request_error: image_parse_error)
You uploaded an unsupported image. Please make sure your image is valid.

However, the mediaType is "image/jpeg" as it should, the byteImage is a correct, working file when saved with this:
File.WriteAllBytesAsync("debug-image.jpg", byteImage)
and a rather small file too.
Code works as intended for all other images tested (~20 or so) except a specific one

Any help will be much appreciated! Thanks