A control no longer stops updating when one value cannot be converted

A label, or any bound control, could stop updating entirely and show nothing — with nothing on the page to say why.

The cause was the conversion that turns a bound value into the type a control expects. When it met a value it had no reading for, it raised an error. That error travelled out of the live binding rather than being confined to the single update that caused it, and ending a binding ends it for good: the control kept whatever it was showing and never changed again while the page was open.

A value the conversion cannot read now leaves the control at its default for that update, and the binding keeps running. Structured values — a list or an object bound where text was expected — now render as their text instead of stopping the control.