I don't have the issue. I have to log in too after a while but you could save your data to log you in automatically. I have not changed anything but I have had some requiring made, regarding the speed problem. There might be something there but nothing that will last.
And I did change the registration progress to an extent that we have eliminated the spam bots now.
I will have a look at the cookie settings again. .
But remember it could be on your end.
I will also check the database...
Edit:
Ok this is what I came up with the cookie is set to last for one hour 3600 sec. dedannas first link is verry rellevant.
dedannas second link is just a general solidarity "problem"; When you try to post several pages into a post it will give you a problem. Just don't do it!
Also the fact that that you failed to mention the extraordinary length of the post and made me check it to find out for myself, sugests that you think I am in need of occupation therapy.
Well I am not
It could be that this is a bug -but then again most people will not discover it because they do not try to paste the Bible in here. In that case you could risk an empty post.
The data will be in the database though.