Bug Unable to set default text in text fields

When I type something into a textfield and click somewhere else the text immediatelly disappears. And I dont mean just visually the text vanishes from the "text input" field. Everytime I create a new text it works normally for a while and then when I do something, I thnk it happened after I saved a script, the text input disappears and is unable to be written again.

What's causing this behavior? And How can I fiix it?