REPL is impossible to work with now:  Caret backs up one position

### Describe the bug

Every time you type something on a new line, the caret position resets to the previous position.  So trying to write `"<button>"` ends up as "button><".

### Reproduction

Try it out.

### Logs

_No response_

### System Info

```shell
REPL
```


### Severity

annoyance