A quick Google search reveals that Windows 10 users often experience a number of VPN-related issues. Here’s another Windows bug that you may face when trying to connect to a VPN from the system tray menu.
After installing Windows 10 1809 update you may find your machine slow down dramatically, the following can help
If you're experiencing issues that affect Microsoft Teams, clearing the cache on your device may help. After you clear the cache, restart Teams.