[Smush Pro] Activated CDN serving in Smush Pro. No images on front

This issue is urgent.

We activated and set up CDN serving of images and they disappeared from front end.
We acknowledge that this might be due to the images being transferred to the CDN network and they might appear after it is completed but there is also a possibility that this is an error.

Is this behavior expected/normal on this operation?
Or do we need to worry and deactivate the CDN serving until fixed?

PS: site in under maintenance using Coming Soon plugin by SeedProd
Thank you.