Since I installed the chome browser and the universal lastpass extension, when I open lastpass, I have to re-tick the box "remember email" every time -- otherwise on the next log in I have to add my email as well as my password!
windows 10, 1809, chrome Version 72.0.3626.109 (Official Build) (64-bit)
Lastpass Version 4.24.0
Before using this chrome/lastpass combination other browsers and chome earlier allowed one to ticked the "remember email" box once and it remained ticked unless you unticked it!