I thought the issue was related to the bundle for racial justice and equality, but I have another game I have purchased that also shows the "buy" button even when I attempt to play the installed and purchased game from within the app.
It seems to depend not on whether you have purchased the game, but which path you take to get to the game page. This makes no sense. If I own a game, the system must know this, whether I click things in the right order or not.
I want to like itch. I prefer it to steam in theory. But issues like this make it very hard to use.
For example, I decided to buy some games that are in the summer sale. Not because I need more games right now (gonna take a while to get through the bundle), but because I want to support the site and some of the developers that were involved in such an amazing fundraising effort. Unfortunately, the site has no idea which games I already own and will apparently sell them to me over and over. This is a fundamental flaw in the entire site. If it can not be fixed, the site is basically unusable. I don't mean to be so harsh, but I'm quite frustrated and I imagine many many others are as well.