Npcap 1.3.1 jams the PPPoE Internet connection

I have a Win7 x64 with PPPoE connection to my internet provider ovel local ethernet connection.

Have installed latest Wireshark 3.4.6 with npcap 1.3.1 (with additional option "Support raw 802.11 traffic (and monitor mode) for wireless adapters"). All looks ok,
Reload PC.

After trying to start internet connection immediately get an error
"813 You have attempted to establish a second broadband connection while a previous broadband connection is already established using the same device or port. Please disconnect the earlier connection and then re-establish the connection."
Same error on retrying.

Trying "net stop npcap" - answer is "no such service".

Reload PC - it hangs on shutdown screeen.

On next load started npcap uninstall - it hangs in the middle of process.
Reload PC - it hangs on shutdown.

Load into safe mode, successfully uninstalled npcap,
Rebooted, installed winpcap & wireshark - works ok,

What is a reason of such behaviour & how to fix that?

Start by reproducing the reported setup: Windows 7 x64, PPPoE over Ethernet, Npcap 1.3.1 with the raw 802.11 option, and Wireshark 3.4.6. Investigate the PPPoE error, shutdown hang, missing npcap service, and uninstall hang; done means the connection, reboot, service handling, and uninstall work without hangs.