Lucee isDate evaluation not working correctly

Question

Lucee isDate evaluation is not working correctly look at the following code snippet and the attached screenshot of the resulting dump.

But coldfusion working properly

<cfoutput>
    <cfdump var="#dateformat('02 66795860','yyyy-mm-dd')#" />
    <cfdump var="#isDate('02 66795860')#" />
</cfoutput>