Delta request for sites doesn't return the correct ID of the site, only a subset

I am using the latest version (2.3.0), and I want to get the list of all sites.

When I use the classical SitesRequestBuilderGetRequestConfiguration and invoke

$response = $context->sites()->get($configuration)->wait();

I get the correct set of values - instances of \Microsoft\Graph\Generated\Models\Site where ids of all the listed sites conform to the full specification of "Site collection hostname, Site collection unique ID, Site unique ID".

When I use DeltaRequestBuilderGetRequestConfiguration and invoke

$context->sites()->delta()->get()->wait()

all the instances of \Microsoft\Graph\Generated\Models\Site look identical, with the exception of the id field, which is suddenly truncated to the Site unique ID only. (Which isn't really unique globally, only within a certain site collection.)

The official documentation is a bit unclear on this. The example for obtaining the whole set clearly indicates that full ids should be returned:

"id": "contoso.sharepoint.com,da60e844-ba1d-49bc-b4d4-d5e36bae9019,712a596e-90a1-49e3-9b48-bfa80bee8740",

but the "Removed" response only indicates the Site unique ID only.

"id": "bd565af7-7963-4658-9a77-26e11ac73186",

Without consistent behavior, the delta requests will be unusable.

Start by reproducing the two calls shown in the issue: SitesRequestBuilderGetRequestConfiguration and the sites delta request. Compare the returned Site ids with the Microsoft Graph site-delta documentation, including the removed response example. Done means the SDK behavior is either corrected or the API inconsistency is confirmed and clearly documented.