MIAW button is not loaded on external websites due to unexpected CORS preflight requests

MIAW button does not load if a 3rd party library on the external website (for ex: Azure Application Insights) adds correlation headers (for ex: "Priority" header) to the XHR requests causing unexpected CORS preflight requests for MIAW embedded-service-config and businesshours requests.

The following errors are seen in browser console:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://MyDomain.my.salesforce-scrt.com/embeddedservice/v1/embedded-service-config?orgId=<orgid>&esConfigName=<ESDDevName>. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 403.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://MyDomain.my.salesforce-scrt.com/embeddedservice/v1/businesshours?orgId=<orgid>&esConfigName=<ESDDevName>. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 403.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://MyDomain.my.salesforce-scrt.com/embeddedservice/v1/embedded-service-config?orgId=<orgid>&esConfigName=<ESDDevName>. (Reason: CORS request did not succeed). Status code: (null).

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://MyDomain.my.salesforce-scrt.com/embeddedservice/v1/businesshours?orgId=<orgid>&esConfigName=<ESDDevName>. (Reason: CORS request did not succeed). Status code: (null).