Serious Performance issue

Good morning,

I’ve just found a serious performance issue with this plugin.

I’m using it with single images (not galleries), and I’ve found that it loads all the full size images before that the user clic on any of them.

This slow down the website performances a lot, and mobile users are downloading a lot of data before it is needed.

Moreover, Google Page Speed seems to be really upset from this behaviour.

Can you fix it, and make the full size images lazy loading only when the users clic on the thumbnails?

This plugin didn’t seem to behave like that in old versions (but I’m unsure about that).

Thank you in advance