Entity State widget append attribute does not remove properly on Editing

**Home Assistant Android app version(s):**
2025.11.4-full
**Android version(s):**
16
**Device model(s):**
Galaxy S24 - SM-S921B
**Home Assistant version:**
2026.1.2

**Description of problem:**
When trying to edit the Entity State widget's Attributes, the attributes keep appending.

**Steps to Reproduce:**

- Add an Entity State widget. (A/C in my example)
- Enable the append attribute option.
- Select an attribute. (temperature in my case)
- Save the widget.
- Edit the widget again.
- Change the attribute. (temperature to current_temperature in my case)

**Expected Result:**
Only the attribute current_temperature is displayed.

**Actual Result:**
Both temperature and current_temperature are displayed and can be seen upon entering the edit screen again.

**Additional information:**
**Workaround:** Uncheck the attribute checkbox. Save. Edit again and reapply.