bigKRLS
                                
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                        page keep loading and show nothing unless executing vignette() twice
version: '3.0.4'
browser: Chrome Version 75.0.3770.100 (Official Build) (64-bit)
OS: Windows 10

The same behavior was also observed with Jupyter Lab.
Interesting, thanks for the head's up. I don't usually view vignettes that way. Does that happen with other libaries' vignettes?
I never actually used vignette() before and don't really know other libraries that use this function.