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

https://feedback.genesis.vision/communities/1/topics/186-decimal-points-for-balance-and-logs-for-gvt-are-different

I encounter this problem today, completely blank page after switching to dashboard page.

Better illustration

From log, 4 decimal points

But my remaining balance is 2 decimal points