Apple App store rejection Issues

Hello, we are using the latest version of the Estimote SDK in our app and apple has been rejecting the same under the following grounds:

Guideline 2.3.1 - Performance

We discovered that your app contains obfuscated code, selector mangling, or features meant to subvert the App Review process by changing this app’s concept after approval to the App Store.

How can we get this fixed? We have been trying to update our app since March 2020, and have updated our pods in July 2020 as per the latest SDK.

Looking forward to your response.