I am going to simplify and try to explain it with all possible details.
when I open the browser for example I have 100 open tabs (fake number as it's much more than that) then I open another 50 new tabs
if I get a power outage or I reset the computer by hand or I just run out of memory I have to manually close the browser by cancelling processes with Process Hacker or Windows taskbar manager.
then I restart the browser but to my surprise I only see the same 100 open tags of the previous session.
I get mad because I have to restart my previous work from the beginning.
however the links I have added on to the bookmarks are ok, and the browser history shows all links I have visited too.
I have to note I have noticed the exact opposite as well, when I open the browser I found more tabs than I could had on my previous session....
I have never suffered this issue with previous Serpent versions when I had 300 or more open tabs at a time and I very often reach the 4GB of RAM limit