[Targets] Variables "for this sprite only" are modified for the wrong target when in an "as () do {}" block

<img width="610" height="481" alt="screenshot" src="https://github.com/user-attachments/assets/8227b3cc-3e03-434d-a0e0-8952e7ae1d64" />

## Expected output
```
master: false
clone: true
```

## Actual output
```
master: true
clone: false
```

---

The same issue happens with the `(my variable)` block (reading the variable instead of setting it).