shortcode doesn't worsk on new post

Hi!

Suddenly, “Arconix Shortcode” make me some troubles: shortcodes works on old posts, but not on new ones.

When i publish a new post i must reinstall the plug-in for making it working. Then all is fine, untill the next post.

Thx.

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PS: sorry for my very, very bad english.

https://wordpress.org/plugins/arconix-faq/