Miraculous Ladybug Theories

Oblivio

I love this episode so much!!!!!!!! The ending though was pretty funny. The whole episode was beautifully made and I'd have to say this is my favorite episode! What do guys think about this episode? Now onto my question...

If everything got turned back to normal at the end of the episode. How was the picture that Alya took and ended up posting still there?

Either this was a mistake which I kind of doubt or things that happen after the villain gets defeated stay.
Like how that picture stayed on Alya's phone.
Yes I know that would mean the kiss would be remembered or does it?
Since their minds were erased during battle the lucky charm would have given their memory from where they left off before hand.