Character Sheets not saving changes

In the campaign that we are currently running, the player's character sheets are not saving updates.  The sheets don't save anything. You update EXP, it gets reverted, you update a stat, it gets reverted, you update your character info, it gets reverted.  

Which sheet and is happening for DM and players?

Before exploring the potential technical issues check to see if there are duplicates of the attributes on the attributes and abilities tab as this has been known to cause this 'roll-back' behaviour in the past. If not then please answer OSC's questions before following the technical help steps: Can you please follow Steps 1-3 of our Solving Technical Issues wiki page, taking special care to temporarily disable all browser add-ons and extensions, temporarily pause your anti-virus, and try switching browsers (for Chrome/Firefox specific issues) to see if one of those components is causing the problem. If all of that fails, please follow Step 4 , including providing all of the necessary information, so that we can further assist you.

I noticed this too during my last game yesterday. I used a char sheet for D6 Fantasy (no duplicate attributes as far as I see), and me and one of the players had the character opened at the same time, possibly we edited it also at short intervals. I had it in a separate popup window (both of us used google chrome), I keep char sheets open in a popup window during the whole session. The players open and close them as needed.