Dear Siat_346
Good day! Thank you for posting in Microsoft Community. We are happy to help you.
Based on your description, it seems that when you a new list item ist created with a flow, all the buckets will become mess up in sharepoint list with json formatting in Board view.
To help you better and moving forward, we would like to collect more detailed information about the situation you are experiencing. Please kindly share with us the information below so that we can do a test on our end to find the root cause:
- Can you tell us how did you create the JSON code and the flow?
- Can you provide the Json code you're using?
- Does other sharepoint list experienced the same behavior?
- Please try to change to a different browser or use inprivate window to check the behavior.
We’re looking forward to your reply and will continue to help you all the time! If there are any misunderstanding or unclear, you can post back in your free time.
Your understanding and patience will be highly appreciated. I hope that you are keeping safe and well!
Sincerely,
Stacey | Microsoft Community Moderator