Alpha characters are allowed in spark Textinput which restrict Alaph characters while playback flex automation

Steps to reproduce:
1. Create a simple ADK 4.1 or 4.5 project with a Spark TextInput box which restrict alpha characters
2. Record the actions with QTP
3. Playback the script

Actual Results:
Although the alphabetic characters are not visible in the spark input while recording, it's being recorded at QTP and
then you playback the script, characters are being added to the TextInput

Expected Results:
Alpha Characters should not be visible in TextInput box

Workaround (if any):