Thank you for the feedback!Figured out my issue. It seems that for what ever reason it doesn't work for me if I'm using firefox to run the game.
It seems that it was caused by the event being detected as a PointerEvent by Chromium-based browsers, and as a MouseEvent by Firefox.
Could you try this quickfix and see if it works?
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It worked on my side, although I only did a quick test and didn't check if it would break other elements.