Performing an erroneous update to an EmbeddedCollectionField breaks references to the field's source

[Fyorl]

console.log(actor._source.items === actor.items._source); // true

// Dry-run update
actor.updateSource({ items: [{ name: 'foo', type: 'weapon' }] }, { dryRun: true });
console.log(actor._source.items === actor.items._source); // true

// Erroneous update
try { actor.updateSource({ items: [{ name: 'foo' }] }); } catch {}
console.log(actor._source.items === actor.items._source); // false