I think my save just broke. Had a power outage and when I logged back in everything reset except for my level. Almost level 800k and everything else is back to start
http://prntscr.com/mjzngz I found this bug when I decided to leave an autoclicker on the spawn boss button. I think that since the boss has negative HP, it automatically dies before coming onscreen. It could be the same thing that happens when I hit the point where enemies become invisible.
Exp to next level goes negative somewhere over level 46k when it hits around 1.1e+11 to next level.It then gives you rapid level gain while the exp to next level goes back to positive. It goes back to positive at around level 65.5k with exp to next level at around the e+07 range. Also, the prestige points to be gained drops. Not sure when it happens but at level 66k it is down to 100k on prestige
 "Incremental Adventures"){kind=icon}
 "Dungeon Worlds"){kind=icon}
 "Idle Portal Guardian"){kind=icon}
I have never experience this issue. Maybe, some higher level stats broke the boss calculations. I'll test it deeply.