Flipsky Prop Pin - serious fixing?

There is this pin on the standard Flipsky Prop. See pic. Sometimes it fell off while testing.

I am asking myself and the forum, if this is meant to be like this? There are for sure safer and more elegant and convenient ways to fix a prop.

How do you fix the prop?

Thanks
Christof

I think hardly anyone uses this prop, it’s not so good.
The pin is supposed to be bent so it can’t fall out, cheap low power props sometimes has this solution.

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A common pin for this type of prop :
image