The current protocol Vault.sol has uint256 for shares, but uint96 is used in TwabController.sol. So in mint/burn/transfer, it is forced to convert to uint96. This causes the value to exceed type(uint96).max if asset.decimals()>18, resulting in a loss of value.
Suggesting to add a method like SaftToUint96() to revert if it is larger than uint96:
Note: mint() and transfer() have the same problem.
