### 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.
for (int j = 0; j < glyphs[i].repeat; j++) {
						if (ceil(oofs.x) >= x_ofs && (oofs.x + glyphs[i].advance) <= ofs_max) {
							if (glyphs[i].font_rid != RID()) {
								TS->font_draw_glyph_outline(glyphs[i].font_rid, ci, glyphs[i].font_size, outline_size, oofs + Vector2(glyphs[i].x_off, glyphs[i].y_off), glyphs[i].index, font_outline_color);
							}
						}
						oofs.x += glyphs[i].advance;
					}
					if (oofs.x >= ofs_max) {
						break;
					}
				}
			}
			for (int i = 0; i < gl_size; i++) {
				bool selected = selection.enabled && glyphs[i].start >= selection.begin && glyphs[i].end <= selection.end;
				for (int j = 0; j < glyphs[i].repeat; j++) {
					if (ceil(ofs.x) >= x_ofs && (ofs.x + glyphs[i].advance) <= ofs_max) {
						if (glyphs[i].font_rid != RID()) {
							TS->font_draw_glyph(glyphs[i].font_rid, ci, glyphs[i].font_size, ofs + Vector2(glyphs[i].x_off, glyphs[i].y_off), glyphs[i].index, selected ? font_selected_color : font_color);
						} else if ((glyphs[i].flags & TextServer::GRAPHEME_IS_VIRTUAL) != TextServer::GRAPHEME_IS_VIRTUAL) {
							TS->draw_hex_code_box(ci, glyphs[i].font_size, ofs + Vector2(glyphs[i].x_off, glyphs[i].y_off), glyphs[i].index, selected ? font_selected_color : font_color);
						}
					}
					ofs.x += glyphs[i].advance;
				}
				if (ofs.x >= ofs_max) {
					break;
				}
			}