Radio Inputs Not Outputting Correctly since 2.8.23

Since upgrading to 2.8.23, <perch:input type="radio" /> does not output the correct markup.

This:

<perch:input id="test" type="radio" options="red,blue"  />

Produces the following:

<input id="form1_test0" name="test" type="radio" checked="checked">