So my friend let me try out Arma 3 by adding my account to family sharing. So he logged onto his account on my PC (Using TeamViewer) and added my account to family sharing, and while logged into his account, I downloaded Arma 3. The next morning, I logged out of his account, went onto mine and Arma 3 was there downloaded in my account but it had the “buy” symbol instead of play. I could see all of his other games but I couldn’t play Arma 3.
He also wasn’t playing anything at the time.