Cannot Capture Custom Headers from Instrumented Servers

Describe the bug

Hi everyone,
I have attached the java opentelemetry agent to our application, anh I want to capture one custom header from its response to the clients.

This is the response header:

Date: Tue, 25 Feb 2025 06:12:47 GMT
X-Content-Type-Options: nosniff
Content-Length: 0
X-ORACLE-DMS-ECID: 006Bj5OWiBcA_MYjLp2VOA00060m000JuW
X-ORACLE-DMS-RID: 0:1
X-XSS-Protection: 1; mode=block
Keep-Alive: timeout=5, max=1000
Connection: Keep-Alive
Content-Type: text/xml; charset=iso-8859-1

And inside properties file, I use this configration:

otel.instrumentation.http.server.capture-response-headers=Content-Type,X-ORACLE-DMS-ECID

I dont understand why it only captures the Content-Type, but not the X-ORACLE-DMS-ECID header. Is there any additional configuration for the custom header.

Thank everyone.

Steps to reproduce

This is the response header:

Date: Tue, 25 Feb 2025 06:12:47 GMT
X-Content-Type-Options: nosniff
Content-Length: 0
X-ORACLE-DMS-ECID: 006Bj5OWiBcA_MYjLp2VOA00060m000JuW
X-ORACLE-DMS-RID: 0:1
X-XSS-Protection: 1; mode=block
Keep-Alive: timeout=5, max=1000
Connection: Keep-Alive
Content-Type: text/xml; charset=iso-8859-1

The configuration:

otel.instrumentation.http.server.capture-response-headers=Content-Type,X-ORACLE-DMS-ECID

Expected behavior

It should show both values for the configured headers.

Actual behavior

It should show both values for the configured headers.

Javaagent or library instrumentation version

1.37

Environment

JDK:
OS:

Additional context

No response

Start by reproducing the Java agent 1.37 behavior with the listed response headers and the otel.instrumentation.http.server.capture-response-headers configuration. Compare capture of Content-Type with X-ORACLE-DMS-ECID, and consider the issue resolved when both configured response-header values are captured.