I was actually using the Itch.io launcher, apparently with web games it launches its own little browser thing - now that I think about it, that was probably the issue!
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I tried to replicate the issue, but it works for me on the Itch.io launcher. So I'm a bit clueless about the cause beside being a routing issue on your end, but saw a recording of your stream earlier and it looked fine! I will try to investigate further and still thank you very much for playing the game : ) /alex