mapbox/maplibre: Why are two fonts automatically requested？

Question

my style:

"glyphs": "../resource/fonts/{fontstack}/{range}.pbf"

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"text-font": [ "Open Sans Regular"]

I only set up one font file, but requested two fonts

enter image description here

I hope “resource/fonts/Open%20Sans%20Regular/0-255.pbf”

but：“resource/fonts/Open%20Sans%20Regular,Arial%20Unicode%20MS%20Regular/0-255.pbf”

Answer 1

"text-font" Defaults to Open Sans Regular,Arial Unicode MS Regular