Synchronous REST API Calls to middleware from OFSC

Summary

How to make synchronous rest api calls to middleware/external application?

Content

In our application, we are OFSC integration with OICS (oracle integration cloud service) via event based triggers. We have integration flows for activity move and also have event for activity update for one of our custom field.

Each move and update triggers a flow that updates certain information back to the activity. The user is doing move action frequently among technicians and causing simultaneous flows execution in OICS resulting unwanted results.

I am not sure how to handle this situation. I could not find a way to control the sequence of the OICS flows nor there is a way to restrict user to avoid doing move/update action further until one flow is completed. I believe this is a common problem and few of us here have resolved it and may guide me through it.