Sometimes I don’t have Access?

This is a weird one. I initially had no problem posting, but now I find that on occasion I would write up something and press save and continue editing but instead of it taking me back to the editing of the article, I will see this white screen with the WordPress logo and it would say “Are you sure you wan to edit “” and there would be two options, no and yes. The “no” would be text and the yes is an actual button which is weird, i’d think they would both be buttons. In any case I shouldn’t see this page at all, and it is causing me to lose posts when it happens when I try saving. Anyone heard of this?