Steps:

1. Create part Text with name "text", input text = "Hello world", size 30, color=red
2. Create part Text with name "text2", input text = "Good morning", size 50
3. Set Property > Text > Text Source > text
4. Set Property > Text > Text Source > None

Actual:
"text2" is displayed instead of "Good morning"

Expected:
"Good morning" should be displayed