TextBox with Multiline NOT runs well

The TextBox with a Behavior option Multiline activated not runs well:
The Text is moved to the Hint and lets as null.
This mistake was happening in the prior version and it happens in the present version (in Companion and IPA).
These very curious mistakes take a lot of time for a detection (is necesary test all the options one by one until find yhe issue).

Attached the test AIA
testTXT.aia (3.2 KB)