This has been an issue for a while, whenever I attach files to two DiscordAttachment parameters on the same subcommand, the second one fails to parse (screenshot attached).

Trigger seems to specifically be: a subcommand with 2+ DiscordAttachment params, the first one always works fine, only the second (and presumably 3rd and so on) fails.

What I've tried: removed the = null default from the second parameter (kept the ?) to rule out a default-value interaction, no change, identical error, and it made the field required instead of optional as a side effect, so reverted that.

Versions tested: originally hit on Nightly 02556, still reproduces on Nightly 02594

Here's the hastebin with the logs and relevant code definition: https://hst.sh/awicevatuh.csharp

attachments: discord output, files used on the upload field