Occasional 400 BLOCKED when accessing login request for Ory Hydra

[planders]

I'm using OAuth2Api from the https://www.npmjs.com/package/@ory/client library to make a request to getOAuth2LoginRequest() (which calls the endpoint /admin/oauth2/auth/requests/login). Usually this works fine, but occasionally we've been seeing 400 errors pop up from this call every couple hours or so. A 400 error seems fixable, but unfortunately we aren't getting any useful diagnostic data back with the error. An example error looks like:

{
   code: "ERR_BAD_REQUEST",
   message: "Request failed with status code 400",
   status: 400
}

Is there any way to find out what could be causing this error, or are there any known issues that would cause a 400 like this?
Thanks in advance for any help!

Edit: I found more error details, but I'm not sure what steps I can take to prevent this. Appreciate ideas anyone might have!

{
    message: "Blocked",
    reason: "Request has been marked as malicious.",
    status: "Bad Request"
}