Jellyfin server is not always accessible?

[LesterQ]

I have a website hosted on NoIP, which redirects to my server. This functionality works perfectly, allowing people outside my network to access my website. I can also access it myself. However, after a few days, it suddenly would stop being accessible. I’ve had to repeatedly restart the server everytime it becomes inaccessible and then it will become accessible again. 

I use Mac Mini M1 with thr latest OS if that makes any difference. 

Thanks.