Hmmm after some testing I realized that creating some new title block worked as you mentioned about the nested objects. However I tried to do some manipulation and still the TOC disappears after some changes (without nesting explicitly with something). Then creating just a new testing Title makes the WHOLE toc work and show results which is rather confusing and not very intuitive, looking forward for this update. 
Is there some potential timeline to know when would this be put in place ? I would prefer to build my soon coming articles based on a pattern which works to show the TOC thus waiting for another testing session to know whats the most efficient :) Of course something approximate, is this update gonna be in days, weeks or months :) ? 

My question about color was for URL links in general which are automatically blue for me now (I might have changed it once without noticing under which part of the theme I set it up). About TOC settings I shall be alright just the url itself. And btw other color question would be how to change the one for the Go On Top button with the arrow, it stays Orange and I dunno how to change this one into blue or anything else :) 

Thank you very much in any case. 

My additionnal question is how to change the color and style of any urls I use within the theme / elementor if you have such answer as well :) 
Thank you  

I never had to do that could you elaborate on what shall be exactly shared and how this is SAFELY done please ? :) Thanks

Hey guys, 
While editing in Elementor my posts are not keeping headings for a TOC (I enabled it in Customize section for Posts), I used Title, or Text Editting -> heading format, same outcome -> no TOC appearing. 
WHen I switch back to Kadence page builder editing (where I first tried to build my blog) the headings are still showing up and the TOC I setup on Customize appears accordingly. Is there anything I could do about that ?