Hi ​@MWahyuA , thanks for flagging this and for submitting a bug report! (For reference, your case number is #1536551.)

Our team will take a closer look and try to reproduce the issue where the glass effect appears in Present mode but disappears in Prototype mode directly with your file.
I’ve also escalated your report internally so it can be reviewed more quickly, thanks for your patience.

In the meantime, could you also try force-quitting and restarting Figma to see if the effect reappears? This can sometimes refresh rendering issues.
Also, please check whether the issue occurs in both the browser and the desktop app, and let our team know, that information will help us narrow it down!

Thanks again for bringing this to our attention!