remember me cookie issues
 

I already posted a question about this issue, but i see there appears to be lots of problems with Vbulletin 3.8.6

We recently upgraded to 3.8.6 and since then it logs users out and does not remember username or password
I have checked settings in vbulletin options and cant find where to correct this

can anyone suggest a fix or even an alternate bulletin board system without all the problems?