WCS 2.0.1 Not working with ESRI Javascript 3.33

Question

Trying to implement ESRI WCSLayer Class to work with WCS 2.0.1. This works perfectly with WCS 1.0.0, however, when using WCS 2.0.1 I get the error. I have been testing using Geoserver 2.18 to configure the WCS endpoints.

Getting error in browser as follows:

3.33:115 Error: not a valid multipart coverage response
    at WCSLayer.js:189
    at c (3.33:104)
    at e (3.33:104)
    at b.Deferred.resolve.callback (3.33:105)
    at c (3.33:105)
    at e (3.33:104)
    at b.Deferred.resolve.callback (3.33:105)
    at c (3.33:105)
    at e (3.33:104)
    at b.Deferred.resolve.callback (3.33:105) "Error: not a valid multipart coverage response
    at https://js.arcgis.com/3.33/esri/layers/WCSLayer.js:189:109
    at c (https://js.arcgis.com/3.33:104:350)
    at e (https://js.arcgis.com/3.33:104:139)
    at b.Deferred.resolve.callback (https://js.arcgis.com/3.33:105:479)
    at c (https://js.arcgis.com/3.33:105:63)
    at e (https://js.arcgis.com/3.33:104:139)
    at b.Deferred.resolve.callback (https://js.arcgis.com/3.33:105:479)
    at c (https://js.arcgis.com/3.33:105:63)
    at e (https://js.arcgis.com/3.33:104:139)
    at b.Deferred.resolve.callback (https://js.arcgis.com/3.33:105:479)"
l @ 3.33:115
(anonymous) @ 3.33:116
filter @ 3.33:72
m @ 3.33:116
3.33:115 Error: not a valid multipart coverage response
    at WCSLayer.js:189
    at c (3.33:104)
    at e (3.33:104)
    at b.Deferred.resolve.callback (3.33:105)
    at c (3.33:105)
    at e (3.33:104)
    at b.Deferred.resolve.callback (3.33:105)
    at c (3.33:105)
    at e (3.33:104)
    at b.Deferred.resolve.callback (3.33:105) "Error: not a valid multipart coverage response
    at https://js.arcgis.com/3.33/esri/layers/WCSLayer.js:189:109
    at c (https://js.arcgis.com/3.33:104:350)
    at e (https://js.arcgis.com/3.33:104:139)
    at b.Deferred.resolve.callback (https://js.arcgis.com/3.33:105:479)
    at c (https://js.arcgis.com/3.33:105:63)
    at e (https://js.arcgis.com/3.33:104:139)
    at b.Deferred.resolve.callback (https://js.arcgis.com/3.33:105:479)
    at c (https://js.arcgis.com/3.33:105:63)
    at e (https://js.arcgis.com/3.33:104:139)
    at b.Deferred.resolve.callback (https://js.arcgis.com/3.33:105:479)"

Any idea what sort of multipart coverage response is expected by the API?

Has anyone used ESRI 3.33 successfully with WCS 2.0.1?