Select menu does not preselect the value corresponding to an mv-default attribute

[karger]

If the property on a select menu has an mv-default, one would expect the select menu to be set to the value specified in the mv-default. If the option value is a literal it works, but if the option value is an expression it fails.
https://codepen.io/karger/pen/BapqBLa?editors=1100

Unclear what should happen if the mv-default value truly has not match among the options.