CDN Akamai does not work correctly which HST ESI

If component is marked as async and mode=esi, markup rendered for src tag escapes & characters:

<esi:include onerror="continue" src="http://localhost:8080/site/?_hn:type=component-rendering&amp;_hn:ref=r34_r4">

Note the &

This causes an 500 error when using AKAMAI, expected markup (confirmed to be working) should be:

<esi:include onerror="continue" src="http://localhost:8080/site/?_hn:type=component-rendering&_hn:ref=r34_r4">

Then this results in the whole page being rendered as esi in itself, so recursively.

Note

since the HST returns correct html for an esi include, this issue is changed to an improvement since as far as I can judge it is Akamai not calling ESI includes correctly wrt html escaping