Interesting!
My connection is wired (copper and fibre optic) however, I do not live in the United States.
Thanks for getting back to me. I guess this is going to be a tricky issue to bugfix; for even if you had a 'resubmit' button it could be abused by hackers caching in auto-generated images. I guess all I have is to disable screensaver whilst I'm in the middle of a paint (in case it's suspending network connection) and cross my fingers. Thanks again! It's a fun game! :)