Sales Pack: Error When Copying Sales Order Items to Invoice Items

[blueprint]

After specifying a Sales Order when creating an Invoice, I noticed that the Products aren't being copied into the Invoice items list.

Upon further investigation (using Google Chrome developer tools), I'm seeing the following error:

VM2198:260 Uncaught (in promise) TypeError: Cannot read property 'id' of null
at child.eval (eval at _execute (loader.js?r=1558104528:94), <anonymous>:260:31)
at Array.forEach (<anonymous>)
at child.afterRender (eval at _execute (loader.js?r=1558104528:94), <anonymous>:259:26)
at child._afterRender (bull.js?r=1558104528:459)
at child._afterRender (bull.js?r=1558104528:456)
at child._afterRender (bull.js?r=1558104528:456)
at child._afterRender (bull.js?r=1558104528:456)
at child._afterRender (bull.js?r=1558104528:456)
at child.<anonymous> (bull.js?r=1558104528:421)
at child.<anonymous> (bull.js?r=1558104528:682)

I've set 'isDeveloperMode' to true to see if this could help me but I'm so far puzzled as to what could have triggered this.

Seems to be from the sales:views/quote/fields/item-list view.