Can't update app while VPN is connected (Packet Tunnel Provider)

I've update my custom VPN app at the App Store to a newer version (Network Extension, Packet Tunnel Provider, macOS).

It seems that the existing apps on the users' Macs can't be updated when they are connected to the VPN.
Automatic update failed, and they also tried to go directly to the store, and manually download the new version.
It seems that they are able to download the new version, but the installation fails.
They are able to update to the new version only after they're disconnecting the VPN.

This is probably a relevant log from their Console:

Code Block 
pkd: [com.apple.PlugInKit:holds] hold refused. Busy plugins: <private>
appstoreagent: (PlugInKit) [com.apple.PlugInKit:holds] <PKManager:0x7fea5e544f50> hold request for [<private>] with flags: 0x2 completed with error: Error Domain=PlugInKit Code=14 UserInfo={busyPlugInUUIDs=<private>, NS       LocalizedDescription=<private>}

I know that there are some reports here about this problem:
https://developer.apple.com/forums/thread/128894?answerId=652178022#652178022
And even on StackOverflow.
But I don't know about the status of this bug - are you familiar with it?

I also opened FB8938775