### Godot version

4.0 Beta 11

### System information

Windows 10 version 22H2, GeForce Game Ready Driver Version 528.02, GTX 1070

### Issue description

Since Beta 11 this error is given whenever a project is run in the forward+ renderer with OpenXR enabled. This error is not present with Beta 10 and previous versions.
![image](https://user-images.githubusercontent.com/38119387/212044209-1179b908-f010-47a1-ae53-bc2faadc30de.png)

I've tested with projects created in previous versions as well as the current version (Beta 11)

### Steps to reproduce

Create project, enable OpenXR in project settings, and run.

### Minimal reproduction project

N/A
print_verbose("On state existing");
	for (OpenXRExtensionWrapper *wrapper : registered_extension_wrappers) {
		wrapper->on_state_exiting();
	}
	
	return true;
}
void OpenXRAPI::set_form_factor(XrFormFactor p_form_factor) {
	ERR_FAIL_COND(is_initialized());
	form_factor = p_form_factor;
}
void OpenXRAPI::set_view_configuration(XrViewConfigurationType p_view_configuration) {
	ERR_FAIL_COND(is_initialized());
	view_configuration = p_view_configuration;
}
void OpenXRAPI::set_reference_space(XrReferenceSpaceType p_reference_space) {
	ERR_FAIL_COND(is_initialized());
	reference_space = p_reference_space;
}
void OpenXRAPI::set_submit_depth_buffer(bool p_submit_depth_buffer) {
	ERR_FAIL_COND(is_initialized());
	submit_depth_buffer = p_submit_depth_buffer;
}
bool OpenXRAPI::is_initialized() {