Since updating to MacOS Catalina 10.15.5 I've noticed an issue when signing into my Mac after a restart whereby Avast Web Shield blocks internet access to all applications (example Safari, UE4, App Store, etc). I'm only able to gain internet access by first turning off Web Shield in the Avast Premium Security control centre, then opening Safari and going to an external URL such as Apple.ca then turning on the Web Shield. Version of Avast Premium Security is 14.4