When I use a ValidationTooltip with an InputNumber, a "null" browser tooltip appears when the value becomes valid.

This doesn't happen with Telerik components, for example the TelerikNumericTextBox. Here is a test page -

https://blazorrepl.telerik.com/GQuIaAEV30BmQNoM13

 

The Class parameter is not rendered on the topmost wrapping element and thus I cannot use to fully customize the ValidationTooltip by using CSS.