No package dependencies for NuGet package if nuspec have no dependencies versions

Screenshot of API response is in the attachment.

Problem in that package, in fact, have dependencies, but they not appear in API or Web-interface.

How to reproduce:

• Let's take some nuspec like below. Without dependencies

 <?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2013/05/nuspec.xsd">
<metadata>
<id>Kontur.ID8986</id>
<version>1.0.0</version>
<authors>idevops@place.com</authors>
<owners>idevops@place.com</owners>
<requireLicenseAcceptance>false</requireLicenseAcceptance>
<description>Issue reproduction package</description>
<tags>idevops issue nexus</tags>
<dependencies>
<dependency id="JetBrains.Annotations" version="2020.3.0" />
<dependency id="Newtonsoft.Json" version="12.0.3" />
</dependencies>
</metadata>
</package>
Now let's try to pack this.
 nuget pack ID8986.nuspec -version 1.0.1
 

There will be warning, but still package will be successfully created.
 Attempting to build package from 'ID8986.nuspec'.
WARNING: NU5112: The version of dependency 'JetBrains.Annotations' is not specified. Specify the version of dependency and rebuild your package.
Successfully created package 'C:\temp\Kontur.ID8986.1.0.1.nupkg'.
Push package to hosted repo
 push Kontur.ID8986.1.0.1.nupkg -ForceEnglishOutput -NonInteractive -Verbosity detailed -ApiKey ${ApiKey} -Source https://mynexusinstance.com/repository/hosted-nuget/
Package will be successfully pushed without any warnings
 NuGet Version: 5.7.0.6726
Pushing Kontur.ID8986.1.0.1.nupkg to 'https://mynexusinstance.com/repository/hosted-nuget/'...
PUT https://mynexusinstance.com/repository/hosted-nuget/
Created https://mynexusinstance.com/repository/hosted-nuget/ 280ms
Your package was pushed.
Little offtop:

NuGet Gallery will now allow push such package via web-interface with warning (screenshot in the attachment)

Now let's open the catalogue and we will see that dependency group is empty (screenshot in the attachment)

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