See if below information can help you, I encounter this before too.
You can check your wallet log for exact GVT balance in 4 decimal places.In wallet balance you saw rounded up numbers in 2 decimal places but in fact that is a 4 decimals number, I have raised this issue in another ticket
I encounter this problem today, completely blank page after switching to dashboard page.
From log, 4 decimal points
But my remaining balance is 2 decimal points
Customer support service by UserEcho