McAfee, Avast, Norton, and Kaspersky are the worst about interfering with the game. The worst thing about McAfee and Norton is they cannot be disabled. Disabling them just stops the reporting of issues, but does not stop the problems they cause. The only recourse for those products it to remove them from the computer and get the tool, from their website(s), which will undo the damage they do when they install.
This could also be cloud related, but we need to know what field of what terrain the issue was occurring at.