TOC works in K2 Item ?

Now it works. But is that supposed to be like that?

interesting ...
no it is not supposed to work like that, just a new scenario that needs to be improved

I'm busy on another project for now, but I will check that next week. Please remind me if I don't come back to you

Understood, thank you! Will do. Perhaps also nice feature to border the table as an option? Looks nicer i think.
Fogot to ask can i also put the shortcode in a module for a page?

yes some options to style it would be cool, for now you can do that simply using css

Can i place on a page the shortcode in a module? So i can place the TOC where I like, and not in the article itself?

it will work only with modules that passes the content data to the plugins, it may work in a "mod_custom" module but not each module type
Note that it will work wihtin the module, I mean that it will list the text from the module, not the text from the article where you load the module