Having `display: none` is not required for the tooltip container. The container is an empty div which is not visible, and even after adding children which are

Having `display: none` is not required for the tooltip container. The container is an empty div which is not visible, and even after adding children which are not directly visible `inside` this div keeps this container div invisible. You can check out some examples in https://github.com/mui-org/material-ui/issues/27879 https://github.com/mui-org/material-ui/issues/27879