### 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.
int layout_count = GetKeyboardLayoutList(0, nullptr);
	ERR_FAIL_INDEX_V(p_index, layout_count, "");
	HKL *layouts = (HKL *)memalloc(layout_count * sizeof(HKL));
	GetKeyboardLayoutList(layout_count, layouts);
	String ret = _get_full_layout_name_from_registry(layouts[p_index]); 
	if (ret.is_empty()) {
		WCHAR buf[LOCALE_NAME_MAX_LENGTH];
		memset(buf, 0, LOCALE_NAME_MAX_LENGTH * sizeof(WCHAR));
		LCIDToLocaleName(MAKELCID(LOWORD(layouts[p_index]), SORT_DEFAULT), buf, LOCALE_NAME_MAX_LENGTH, 0);
		WCHAR name[1024];
		memset(name, 0, 1024 * sizeof(WCHAR));
		GetLocaleInfoEx(buf, LOCALE_SLOCALIZEDDISPLAYNAME, (LPWSTR)&name, 1024);
		ret = String::utf16((const char16_t *)name);
	}
	memfree(layouts);
	return ret;
}
void DisplayServerWindows::process_events() {