O que significa O texto da legenda pode ou não deixar de ter relação com a imagem ?

See a translation

@franzinhafran2018 it means that the caption of a image/picture/photo can (eventually, I'm guessing, without further context) stop having relation with what the caption says - like the caption text it's about something and the image it's about another thing. so the caption may or may not be related to the image

you can translate this sentence as:

"The caption text may or may not be unrelated to the image"

or

"The caption text may or may not stop having relation with the image"

if there's a context where this is from, maybe I could explain better? but I guess it will do for that sentence alone ^^