I get same (all NaNs) just by leaving game running some time, and then prestige 3-4 times. And get whole chrome hangs for about 30 secs after.
As I speak I am writing an update to the game to address this and a few other issues, it should be sorted soon, but I spilled drink on my keyboard so my typing is kinda fucked now and a bit slow
Here is m,e typibng without correctibng sabnytrhibng bnecsause the juices m,sake m,ultiple lettewrs press sat the ssam,e tim,e