The issue is that instead of displaying the correct amount of Robux that you should have after making a purchase, the remaining amount is coming up as NaN.
This can be reproduced by going onto the marketplace and then press the buy button on any item.
Here is a link to the original post, the original creator I believe doesn’t have access to post here and this bug is pretty relevant so I’m posting this.
Expected behavior
I would expect instead of the Robux remaining to show up as the actual amount remaining after the purchase and not as NaN.
I’m hoping that they’ll fix it, it can be a little annoying, but not fully since you’ll know how much you have after you’ve already bought it instead of before.