Great question — answering as the UphillTech team:
Trying different browsers and clearing the cache didn't help either. I've solved it by adding key display: 'swap' , where value swap means: Gives the font face an extremely small block period and an infinite swap period. Where font "block" period means: If the font face is not loaded, any element attempting to use it must render an invisible fallback font face. If the font face successfully loads during this period, it is used normally. And font "swap" period means: If the font face is not loaded, any element attempting to use it must render a fallback font face. If the font face successfully loads during this period, it is used normally. And that's pretty much what I was looking for. I've...
Full answer by Kevin Mahrous: https://stackoverflow.stackexchange.com/a/76484168 (CC BY-SA 4.0).
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