Hey guys,
It's normal to not see the updated value of stats when returning the PC/laptop from Sleep and looking in the same browser tab you left the game in. But that does not affect the calculation of stat values on the server so the game will still know the correct values when you return to it.

To be sure of this, next time you return to the game from Sleep mode, please don't do anything with the tab you left it in, but open the game in a new one - don't close the other one yet - and you should see the correct values for the stats. Please do this when you have the opportunity and report back if you still don't see the correct values.
Thanks.