Numeric Stepper value once NaN does not change to any number user sets or increments

Problem: Numeric Stepper value once NaN does not change to any number user sets or increments

Method:
-Run sample application "SampleFromClient.mxml"
-Click the button "Set Value to 'Nan'"
-set the value to some other value say 101 [any 100-999]
-Click the numeric stepper to increment or decrement the value.

Result:
The text on the Numeric stepper remains 'NaN'

Expected:
Should change an increment w.r.t the input value

Workaround:
Crude please refer "workaround.mxml"