fetch override does not return the response in xwiki.js 12.10.10

Hello,

We are trying to upgrade from XWiki 12.10.4 to 12.10.10

Unfortunately, we detected a brocker change for this piece of code was added in 12.10.9 which is a bit surprising for a patch version
[https://github.com/xwiki/xwiki-platform/blob/xwiki-platform-12.10.9/xwiki-platform-core/xwiki-platform-web/src/main/webapp/resources/js/xwiki/xwiki.js
]

/**
 * Overwrite the fetch function in order to add our own response callback on all fetch requests made from this page.
 */
 var interceptFetch = function() {
 var originalFetch = window.fetch;
 if (originalFetch) {
 window.fetch = function() {
 return originalFetch.apply(this, arguments).then(function(response) {
 handleResponseHeaders($.proxy(response.headers, 'get'));
 });
 };

Our XWiki frontend is using fetch to reach our own XWiki API extension so all our UI that use fetch call are not displayed due to a javascript error.

It seems that your overrided version of fetch doesn't return the result and it seems impossible to chain calls like we do here

fetch("/rest/v1/identity/me").then(console.log)

or

fetch("rest/jobstatus/OurJobId").then(process...)

I noticed that you have been patch it in 13.4

return originalFetch.apply(this, arguments).then(function(response) {
 handleResponseHeaders($.proxy(response.headers, 'get'));
 return response;

So maybe it should be applied in a 12.10.11 and it would solve all our issues ?

If not possible we will try a major upgrade to 13.10.2 but it was not planed so far for now.

Thanks