I doubt the never ending loop caused it. Well based on my experienced, I actually tried to run a forever loop just to see (just of curiousity hehe). They hanldled it so well i guess just forgot what happened but certainly not that one. Most of the time that I encountered that is when my internet connection is too slow.

"Submission timed out while communicating with our servers."
Will this message only occur when there is an actual communication error, or could it also occur when I do something wrong (like a never ending loop) in my code?
Have tried for quite some time (> 1h) to submit my solution to a Kata, but gets this all the time