### Godot version

4.0.3-stable

### System information

Windows 10

### Issue description

In some projects ViewportTexture remains pink and doesn't render viewport content after upgrading from 4.0.2-stable to 4.0.3-stable. If a pair of files viewport.h/viewport.cpp are downgraded back to what they were in 4.0.2-stable, problem goes away.

This is how it looks in 4.0.3-stable:
![4 0 3_stable_viewport_4 0 3](https://github.com/godotengine/godot/assets/1449921/44c191a9-4b67-4b02-90b6-4ab615f62a73)

And this is how it looks if viewport.h/viewport.cpp are downgraded back to what they were in 4.0.2-stable.
![4 0 3_stable_viewport_4 0 2](https://github.com/godotengine/godot/assets/1449921/f5abc605-f129-4222-9c0e-e9a07621dd9d)



### Steps to reproduce

Unfortunately, I cannot come up wit a simple demo project reproducing the problem. It exists in some projects and doesn't exist in others.


### Minimal reproduction project

Cannot produce a simple project reproducing the problem. In simple projects it works fine.
if (ABS(dist_y) > limit) {
		return SUB_WINDOW_RESIZE_DISABLED;
	}
	if (dist_x < 0 && dist_y < 0) {
		return SUB_WINDOW_RESIZE_TOP_LEFT;
	}
	if (dist_x == 0 && dist_y < 0) {
		return SUB_WINDOW_RESIZE_TOP;
	}
	if (dist_x > 0 && dist_y < 0) {
		return SUB_WINDOW_RESIZE_TOP_RIGHT;
	}
	if (dist_x < 0 && dist_y == 0) {
		return SUB_WINDOW_RESIZE_LEFT;
	}
	if (dist_x > 0 && dist_y == 0) {
		return SUB_WINDOW_RESIZE_RIGHT;
	}
	if (dist_x < 0 && dist_y > 0) {
		return SUB_WINDOW_RESIZE_BOTTOM_LEFT;
	}
	if (dist_x == 0 && dist_y > 0) {
		return SUB_WINDOW_RESIZE_BOTTOM;
	}
	if (dist_x > 0 && dist_y > 0) {
		return SUB_WINDOW_RESIZE_BOTTOM_RIGHT;
	}
	return SUB_WINDOW_RESIZE_DISABLED;
}
bool Viewport::_sub_windows_forward_input(const Ref<InputEvent> &p_event) {