Nested REPL from TermREPL does not return to rascal prompt anymore

**Describe the bug**

```
rascal>shell()
exactly>1 + 1
Undeclared variable: text
Advice: |https://www.rascal-mpl.org/docs/Rascal/Errors/CompileTimeErrors/UndeclaredVariable|
exactly>
Quiting REPL

```

It blocks there.