### 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.
SWAP(carets.write[caret].selection.from_line, carets.write[caret].selection.to_line);
								carets.write[caret].selection.shiftclick_left = !carets[caret].selection.shiftclick_left;
							}
							carets.write[caret].selection.to_column = carets[caret].column;
							carets.write[caret].selection.to_line = carets[caret].line;
						} else {
							deselect(caret);
						}
						caret_index_edit_dirty = true;
						merge_overlapping_carets();
						queue_redraw();
					}
				} else if (drag_and_drop_selection_enabled && is_mouse_over_selection()) {
					set_selection_mode(SelectionMode::SELECTION_MODE_NONE, get_selection_line(caret), get_selection_column(caret), caret);
					
					set_caret_line(prev_line, false, true, 0, caret);
					set_caret_column(prev_col, false, caret);
					selection_drag_attempt = true;
				} else if (caret == 0) {
					deselect();
					set_selection_mode(SelectionMode::SELECTION_MODE_POINTER, row, col);
				}
				if (is_triple_click) {
					
					selecting_mode = SelectionMode::SELECTION_MODE_LINE;
					selection_drag_attempt = false;
					_update_selection_mode_line();
					last_dblclk = 0;
				} else if (mb->is_double_click() && text[get_caret_line(caret)].length()) {