I just tried deploy the flow to prefect cloud. I found one different is that during local orion run, I can execute sync task and async task within a flow. When I deploy, the flow will stop at calling the sync call and I must need to use async task.

Hi @Andy Yeung I found an open issue that might be related.

Yes, I think its exactly related to this one. Right now the workaround is to change all task to async, even it can be run in sync.