Downloadable product links removal on update via API

[vovsky]

Preconditions

1. Magento 2.2.3/2.2.4
2. Create regular downloadable product, upload downloadable content

Steps to reproduce

1. Update downloadable product via REST API with call: PUT rest/V1/products/{sku}:

{
  "product": {
    "name": "BasicBeginner's Yoga (updated)"
  }
}

Expected result

1. Product attributes specified in request updated, other data remain unchanged

Actual result

1. After update product has no links to download content (no downloadable information).

hi @vovsky thank you for your report.
We've acknowledged the issue and added to our backlog.

[p-bystritsky]

This issue is fixed in 2.2-dev branch.