### 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.
} else if (c == '(') {
							closec = ')';
						}
						if (closec != 0) {
							int stack = 1;
							for (int i = get_caret_line(caret); i < text.size(); i++) {
								int from = i == get_caret_line(caret) ? get_caret_column(caret) + 1 : 0;
								for (int j = from; j < text[i].length(); j++) {
									char32_t cc = text[i][j];
									
									if (cc == '"' || cc == '\'') {
										char32_t quotation = cc;
										do {
											j++;
											if (!(j < text[i].length())) {
												break;
											}
											cc = text[i][j];
											
											if (cc == '\\') {
												bool escaped = true;
												while (j + 1 < text[i].length() && text[i][j + 1] == '\\') {
													escaped = !escaped;
													j++;
												}
												if (escaped) {
													j++;
													continue;
												}
											}