How does this note hide the rhythmic notation

[ifccod]

dear author：
if rhythmMode=ShowWithBeams
How does this note hide the rhythmic notation

I want to render it in tex syntax

[Danielku15]

From how it looks, I think it might be a grace note: https://alphatab.net/docs/alphatex/beat-effects#simple-effects
For those kind of notes, no rhythm notation is shown. But to be sure: Can you provide the Guitar Pro file you used in the screenshot?