@DodgeX thanks for the tip about the research UI! it's a good enough workaround in the meantime until the issue is resolved

Been having this issue recently (version 1.1.104, win64, through steam), and I did a little test in my world, here are the steps I followed {and my thoughts on what I think is happening}:

TAB out of Factorio to another window (a browser in my case, but I don't think it matter which application ...