@ahmadnasriya
I am not avoiding the new knowledge you gave here in this post (i even already use it all the time) 
J.D. once told me the same, but not in detail.
I like to use the flexible “Array-Method”.
But what i always try to avoid are badly generated IDs —> like —> this-is-my-ID.
Instead i prefer to write them like —> thisIsMyID.
Advantage —> no issues with “dot annotation method” 
And this was the reason, why i wrote this…
bad idea —> link-effects-title
good idea → link_effects_title
better idea —> linkEffectsTitle
But you gave me more light into the dark and now i am also able to explain it to myself, thanks!
But i assume that the current issue was caused, because of automatic generated IDs ----> like when you do use dynamic-pages.