Input Validation and Correction is not working properly anymore

[GolexPrime]

Describe the bug
The input validation of the questionnaire-modal does not work with type string anymore. This also prohibits the proper storage of a given answer. Furthermore the input correction also only works on types decimal and integer if the first entered character is indeed a number (nonetheless, the correct value is persisted).

To Reproduce
Steps to reproduce the behavior:

1. Load the Generic Reference Questionnaire into the app.
2. Open the "Fragegruppe 1" category.
3. Enter someting into the input "Das ist eine Freitextabfrage".
4. The button on the bottom does not turn green.
5. Close the modal and open it again.
6. The given answer will not reappear.
7. Without closing the modal navigate to the question "Das ist eine Dezimalzahlenabfrage" and enter anything besides a number.
8. If the entered value starts with anything but a number the input correction is not executed.

Expected behavior

• The validation for type string should recognize an entered string.
• An input for elements of type integer and/or decimal should prohibit invalid input.

Screenshots

Smartphone (please complete the following information):

• Device: iOS Simulator
• OS: iOS 12

Additional context

• The input validation issue came up with a change in the file questionnaireModal.jsx
• The input correction error seems to be the result of a change that occurred in how RN handles the value updates of input elements