Why did this classmate act scared and block me after a simple hi?

Context:
I was in a group assignment, we didn't meet right away.
When we did, it was before Easter break, I texted and told my progress in the group chat many times.
I submitted the report etc.
But when I met her again I just said hi and she was so threatened that she stuck to the wall.
It made me feel like a criminal 😅đŸ„Č.
And by the way I got blocked without even knowing.
I never understood this interaction.
I know my place as a side character but not a villain.

She is from Korea and I am from India.
Updates
2 mo
I met her in exam, this was a different interaction. She is just scared of Indias (maybe had a bad experience with other Indian guy)
Why did this classmate act scared and block me after a simple hi?
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