No-these issues happen maybe once a week or something silly like that-I wouldn't worry-and to back that up I have free hosting, and can't fault it, so that means paid must be even better.
This is a good page:
http://x10staff.co.cc/status/
Find your server in the list...and it's only going to be a longish problem if one of the lights is red (longish problems usually maximum of 2 hours, but usually around 15-30 minutes), so I wouldn't worry. Reliabiltiy is much better on paid, but I'd give free a 10/10-so that just puts it into perspective.
-Note: There's been a red light by ssh on Artic for the last week or something-I doubt that is the cause of your problem.
Hope this helps.
P.S-Does it work now??