I see this happen when no one uses the website for an amount of time. This causes wait times for the next user to get to the website, and I wish not for that to happen. I run my website with Python 3 Flask and every time the website is unloaded, then reloaded, the entire script runs through again, resetting almost everything.
How do I keep my website continuously running all the time?
1) This happens because repl doesn't keep everything online all the time, after a while of no requests, it turns off your repl
2) You can use something like UpTimeRobot (here known as UTR) to keep your repl online by not letting there be any times where nobody is visiting
3) Even then, your repl will shut down whenever repl.it updates things, etc., but it will be better.