My hashrate stabilized to correct ghs after the first 6 hours. All looks great.
I do have something for the suggestion box(or I may be doing something wrong) we need some type of cookie or something for the dashboard so I don't have to keep putting my username and password in every time I want to check my stats. I use android only(other than pi's) and made a shortcut like I do with my other pools, but still have to log in ckpool almost every time.
Yeah it's a php session timeout - on the server I've got it at the php/apache default of 24 minutes.
If you access the web page less than 24 minutes between each time, the php session in the browser should still be alive.
I see that happen all the time myself also, but don't think it's a good idea to have it much longer.
I can extend the session time to 1hr if no one has any objections, but I'm not really keen to have it much longer.