Backspace deletes only one letter in TextField

OutlinedTextField(
            value = intro,
            onValueChange = { intro = it },

            colors = TextFieldDefaults.outlinedTextFieldColors(
                focusedBorderColor = Pink, unfocusedBorderColor = Brown
            ),
            modifier = Modifier
                .bringIntoViewRequester(requester)
                .onFocusEvent { focusState ->
                    if (focusState.isFocused) {
                        coroutineScope.launch {
                            delay(200)
                            requester.bringIntoView()
                        }
                    }
                }
                .fillMaxWidth()
                .padding(30.dp, 5.dp)
                .height(150.dp),
            singleLine = false,
            maxLines = 5,
            textStyle = TextStyle.Default.copy(fontSize = 18.sp),
            keyboardOptions = KeyboardOptions(
                keyboardType = KeyboardType.Text,
                imeAction = ImeAction.Done
            ),
            keyboardActions = KeyboardActions(onDone = {
                focusManager.clearFocus()
            }),
        )

I'm developing an Android app using Jetpack Compose. When I try to delete input texts in Textfield, holding backspace doesn't keep deleting character one by one, but only the last one, so I have to keep clicking the delete button.

Does anyone know how to solve this?

Thank you!