Spring , No "Access-Control-Allow-Origin" after repackaging - spring

Question

I did simple repackaging and that caused Access-Control-Allow-Origin issue with my s3 cloud.
I have a local S3 compatible server to store videos , using Spring , am streaming the videos directly from my local cloud .
Everything is working as expected until I tried to repackage my classes .
I had one package com.example.video with the following classes:
S3Config.java this contain the AmazonS3Client
User.java A model class
VideoController.java Simple controller
VideoStreamingServiceApplication.java application class
When I created new package com.example.s3 package and moved both User.java and S3config.java , i had auto wired issue and that was fixed by using component scan as this answer suggested .
Even after the autowired issue fixed am getting an error when I try to stream .
Access to XMLHttpRequest at "http://localhost/9999/recordins/a.m3u8" fom origin 'null' has been block by CORS policy: No 'Access-Control-Allow-Origin' header is present on the request resource .
Although I do have the header mentioned in my request , Here is my VideoController.java
#RestController
#RequestMapping("/cloud")
#ConfigurationProperties(prefix = "amazon.credentials")
public class VideoCotroller {
#Autowired
private S3Config s3Client;
private String bucketName= "recordings";
Logger log = LoggerFactory.getLogger(VideoCotroller.class);
#Autowired
User userData;
#GetMapping(value = "/recordings/{fileName}", produces = { MediaType.APPLICATION_OCTET_STREAM_VALUE })
public ResponseEntity<StreamingResponseBody> streamVideo(HttpServletRequest request, #PathVariable String fileName) {
try {
long rangeStart = 0;
long rangeEnd;
AmazonS3 s3client = s3Client.getAmazonS3Client();
String uri = request.getRequestURI();
System.out.println("Fetching " + uri);
S3Object object = s3client.getObject("recordings", fileName);
long size = object.getObjectMetadata().getContentLength();
S3ObjectInputStream finalObject = object.getObjectContent();
final StreamingResponseBody body = outputStream -> {
int numberOfBytesToWrite = 0;
byte[] data = new byte[(int) size];
while ((numberOfBytesToWrite = finalObject.read(data, 0, data.length)) != -1) {
outputStream.write(data, 0, numberOfBytesToWrite);
}
finalObject.close();
};
rangeEnd = size - 1;
return ResponseEntity.status(HttpStatus.OK)
.header("Content-Type", "application/vnd.apple.mpegurl")
.header("Accept-Ranges", "bytes")
// HERE IS THE ACCESS CONTROL ALLOW ORIGIN
.header("Access-Control-Allow-Origin", "*")
.header("Content-Length", String.valueOf(size))
.header("display", "staticcontent_sol, staticcontent_sol")
.header("Content-Range", "bytes" + " " + rangeStart + "-" + rangeEnd + "/" + size)
.body(body);
//return new ResponseEntity<StreamingResponseBody>(body, HttpStatus.OK);
} catch (Exception e) {
System.err.println("Error "+ e.getMessage());
return new ResponseEntity<StreamingResponseBody>(HttpStatus.BAD_REQUEST);
}}
If I restore the packages to one , as it was before everything is working fine .
MY QUESTION : Why repackaging caused this issue , any idea how to fix this ?