Hi Huseyin,
i tried your line of code with recent ConTeXt and luatex and i think it worked fine.
See attached files.

Greetings Lutz

Am 7. August 2018 08:29:10 MESZ schrieb "Huseyin Özoguz" <h.oezoguz@mmnetz.de>:
I forget: I use now luatex beta 0.80.0 (and Context from 2015.04.15), 
but the old pdf was compiled with luatex 0.77.0, is that the difference,
which deleted the footnote?

(I hope this does not break the thread....never learned how to use
mail-lists with thunderbird)



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