Does the issue occur in the editor or during gameplay? If it occurs during gameplay, please specify which movement system is being used (free movement or grid movement):
Gameplay - Tested with Grid
Briefly describe the issue you're experiencing:
A text field on a widget that is set to show a property will show the placeholder code instead unless the Read-Only option on the Text Field is ON.
As long as the text field can not be written in during game, it will display placeholder text fine.
[Image shows a widget with two text fields, top one is editable and the bottom one is Read-Only.]

Are there any errors in the in-game debug console or external console window?
No errors
Provide the steps necessary to reproduce the issue:
- create a widget with a Text Field (or two..one Read-Only, one not)
- put a placeholder text inside both text fields ex. ${player.name}
- quick play and show_widget()
Provide a download link to the bare bones project (if applicable):
Can provide one if required.