Task field content disappears in task node configuration

[RicardCots]

Describe the bug
In a task node within a touristic tree, the content of the Task field in the task configuration subform disappears after performing certain actions.

For example, when opening the Field Configuration window and then closing it, the text in the Task field becomes empty. The content only reappears after the node is reloaded.

To Reproduce
Steps to reproduce the behavior:

1. Go to a task node in a touristic tree.
2. Check the content in the Task field.
3. Click on Field configuration, make any change, and close the window.
4. Observe that the Task field is now empty.

Expected behavior
The Task field content should remain visible and unchanged after closing the Field Configuration window, without the need to reload the node.

Screenshots