Mobile version shows duplicate menu

Hi!

When viewing my site on the responsive version, it seems that the hamburger menu is duplicate and appear three, four or even five times. Besides, the problem only happens in the recent posts, but not in the old ones.

You can see an example here: https://voyasercocinero.es/receta-de-pan-casero-sin-utensilios/

Any idea how can I solve it?

Thanks in advance,

Regards!

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