Technical Question Here: Why do my accounts not save passwords when shut laptop lid?

So I know it isn’t exactly the safest thing but for convenience’s sake I let my computer remember my passwords. Then it’ll automatically sign me in to several websites etc… Now I’ve been doing this for quite some time. Suddenly ever time I shut the lid to my computer it all restarts. Nothing is saved and I have to re-enter everything. What’s Up? Is there preference I can change on my computer to stop this??