### Godot version

4.0 beta 15

### System information

Windows 10

### Issue description

It happened with both Google IME and MS-IME, and there was no problem until Beta14.
When typing Japanese characters, it is common to select a character from the suggestion window and then start typing the next character before confirming.
In this case, uncommitted characters are forcibly committed, and input of the next character begins.

**↓Beta15**

https://user-images.githubusercontent.com/186786/214753450-b493cca6-2644-4b3d-8cd2-660565cc3547.mp4

**↓Beta14**

https://user-images.githubusercontent.com/186786/214755127-dde819cc-4d63-403a-99b0-09821671f74e.mp4



### Steps to reproduce

It happened with both Google IME and MS-IME in beta15

### Minimal reproduction project

It is project independent and happens in the editor.
carets.write[caret_edit_order[j]].selection.to_column = 0;
					break;
				}
				
				if (get_caret_line(caret_edit_order[j]) != get_caret_line(caret_idx) || (has_selection(caret_edit_order[j]) && get_selection_from_line(caret_edit_order[j]) != get_caret_line(caret_idx))) {
					break;
				}
				deselect(caret_edit_order[j]);
				carets_to_remove.push_back(caret_edit_order[j]);
				set_caret_column(0, caret_idx == 0, caret_idx);
				i = j;
			}
			continue;
		}
		if (p_word) {
			
			int from_column = get_caret_column(caret_idx);
			int column = get_caret_column(caret_idx);
			
			
			if (is_whitespace(text[get_caret_line(caret_idx)][get_caret_column(caret_idx) - 1])) {
				column -= 1;
			}
			
			const PackedInt32Array words = TS->shaped_text_get_word_breaks(text.get_line_data(get_caret_line(caret_idx))->get_rid());
			if (words.is_empty() || column <= words[0]) {
				
				column = 0;
			} else {