Kong returns 404 : no route matched when there is a high load

Hi Team,

We are observing 404 : no route matched when there is a high load.
We are upgrading to Kong 2.7.1 and observing the issue.
Earlier we were using 2.0.3 and didn’t see this issue.

Has anything changed?

EC2instance type: c5.2xlarge (4 instances)
Request : 2500requests/second
The issue isn’t consistent. Sometimes it works,sometimes it gives the error.

TIA

Any help would be appreciated.

TIA