Optimole and NitroPack are compatible. You just need to disable Optimole's lazy loader from the plugin's from the "General" section in their "Settings" menu.
Check out the video, or follow along with the steps below to see how you can do that.
1. Click on the Optimole plugin and open the "Settings" menu.
2. Disable the "Scale images & Lazy load" option and click on "Save changes".
And that's all there is to it!