stbtt does not work in ubuntu?

[XenoAmess]

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### Environment

* LWJGL version: 3.2.2
* Java version: adopt openjdk12
* Platform: ubuntu 19(linux)
* Module: stbtt

### Description

My engine works fine in windows and I'm trying to port it to linux.
And I just find out that the texts drawing using stbtt is not right.
I will put the two screenshots in attachment...

(focus on the DEMO text in left top corner.)
I just don't know why it happened...

If you wanna reproduce:
the codes can be found in https://github.com/cyanpotion/cyan_potion,
just run com.xenoamess.cyan_potion.cyan_potion_demo.ForceEntrance.main() to enter the demo.

Thanks for reading.