Conditional logic empties fields

Hi All,

I have a simple form:
- 1 checkbox
- 1 field
There is a conditional logic on the field, that if the checkbox has been checked, it should show.

problem is that when I check the checkbox, fill in the field and then turn the checkbox OFF and then ON again, the field is emptied. Is there a way to make sure the field is not empties on conditional logic? It is complete inlogic with normal user behavious if fields are empties when they switch form options.

Is there any option, hook, or anything I can do to prevent this from happening? I'm not using nested conditional logic and currently the form is not user friendly when people are toggeling the checkbox. Thanks in advance.