Hello Kyle,
Thank you for bringing this issue to our attention! You are right, there should be a k-state-disabled class applied to the span element in order for the disabled styling to be set correctly.
We will add this fix in our next dev version. In the meantime, you can apply the class via className property:
https://stackblitz.com/edit/react-weewcx?file=app/main.jsx
As a token of gratitude, I updated your Telerik Points.
Best Regards,
Silviya
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