Inserting or updating int64 data type by hand or copy and paste keep the value changing automatically.

Customer's quote:

For example, trying to type in an int64 number of 252602384126050305 by hand results in 252602384126050336, while pasting it in results in 252602384126050304. It seems that the last two digits that you type are never the same as what compass actually registers.

Those numbers are still in Int64 range. It is reproducible on my machine and irina.shestak.

Customer's provided screen shot: