This is happening to me often. I use one computer for Glitch. I started making a point to Exit The World before walking away. Still happens. Not only losing points, but when a new day has happened while away I sometimes don't get the recharge.
Is this still happening? If it is, can you open a case and leave the time you logged out, what your approximate energy was beforehand and when you noticed it dropping? I looked through our logs and didn't see anything that would've caused you to lose energy. If you can get screenshots that helps too. Thanks!