[Bug]: [Bug Bash] Other versions will lose after selecting a version in the custom version drop-down box for a while

[v-luzh]

NuGet Product Used

Visual Studio Package Management UI

Product Version

Dev\6.4.0.22

Worked before?

No response

Impact

No response

Repro Steps & Context

Details about Problem

VS Version: Main\32726.62
NuGet Version: Dev\6.4.0.22
OS Version: Windows-11-Enterprise-21H2 ENU

Detailed repro steps

1. Create a C# Console App (.NET 7.0) in VS and open the PM UI of the project.
2. Click the “Browse” tab and click a package (e.g. “Microsoft.EntityFrameworkCore”) in the list.
3. Click the down-arrow button of the “Version” drop-down box and select a package version (not the latest version) in the “Version” drop-down list.
4. After a while (about 1 minute), click the down-arrow button of the “Version” drop-down box again.

Expected

The version drop-down list will still show all the versions.

Actual

Other versions in the version drop-down list will lose las below screenshot.

Notes:

1. It does not repro for the non-sdk style project [e.g. C# Console App (.NET Framework)] with the same steps.

2. It reproes on NuGet 6.2.0.131.