When I try to add tags to my ignore list, they are not added. It seems they are, as the window closes, but when I open the configuration again, everything is back to the previous state.

I tried to do it in the client and on the website, same result. On the website I can activate the browser dev tools and can confirm the request goes to the Steam backend and is answered with a 200 but the list in the response is incomplete.

I have this issue for a month or two now.