Possible for this content item to create invalid xAPI statement

[rtibbles]

When using the example drag and drop activity: https://h5p.org/drag-and-drop - it seems to fairly consistently produce invalid xAPI statements.

For example this statement gets produced:

correctResponsesPattern: ["0[.]1"]
description: {en-US: "Drag and drop"}
extensions: {http://h5p.org/x-api/h5p-local-content-id: "45794c2b98973152711cd147fe1658a6"}
interactionType: "matching"
source: [
{id: "0", description: {…}},
{id: "1", description: {…}},
{id: "2", description: {…}},
]
target: [{id: "0", description: {…}}]
type: "http://adlnet.gov/expapi/activities/cmi.interaction"

Which has a correct responses pattern requiring 0 as a source and 1 as a target. However, an item with id 1 only appears in the sources array. An LRS that is enforcing the xAPI spec MAY reject this statement as per https://github.com/adlnet/xAPI-Spec/blob/master/xAPI-Data.md#response-patterns and https://github.com/adlnet/xAPI-Spec/blob/master/xAPI-Data.md#requirements-4