API Error 103 - Unable to Grade Bet Created Through OptiOdds API

Hi OptiOdds Team,
I'm encountering an issue where the grader API returns error 103 "Bet type not supported" for a bet that was originally created using OptiOdds API data.
The Issue:
A bet was placed using market and selection data retrieved from your odds API. However, when attempting to grade this same bet through the grader endpoint, it returns an error stating the bet type is not supported.
Request Details:

Fixture ID: 202510055A719C9B
Market: Method Of Ending (taken from your odds API)
Selection: Submission (taken from your odds API)
Error: Code 103 - "Bet type not supported"

curl --request GET
--url 'https://api.opticodds.com/api/v3/grader/odds?fixture_id=202510055A719C9B&market=Method%20Of%20Ending&name=Submission'
--header 'X-Api-Key: API-KEY'
--header 'accept: application/json'

Is there a different endpoint we should use for grading "Method Of Ending" markets?
If not, what's the recommended way to handle bets on markets that return error 103?
Should we expect certain markets to always require manual grading?

We want to make sure we're using your API correctly. Any guidance would be greatly appreciated!
Thanks for your help!