Druid table went missing

I am new to Druid.
I not sure why my druid table will be missing after sometimes, then it will show up again after sometimes. In the Ingestion Tab, I’m able to see the ingestion, but in the Query, Tab it will be missing after sometimes and show up again after sometimes. What could be the reason?

I can see the task in Ingestion Tab show failed.

When I check the log for the task, it show “Request failed with status code 404”.

Anyone face this issue before?