Clion 2021.2.2 no longer recognises C++20 concepts syntax

Since updating from Clion 2021.1.3 to Clion 2021.2, I've been getting errors with certain C++20 features in my projects. Here is a small project that reproduces the problem for me. Hopefully it's just a configuration issue on my part and not a CLion bug, but any help would be greatly appreciated!

Steps to reproduce:

Create a new C++ Executable project with C++20 support selected.

Copy and paste, replacing the contents of main.cpp, with the first example from https://en.cppreference.com/w/cpp/language/constraints

#include <string>
#include <cstddef>
#include <concepts>
 
// Declaration of the concept "Hashable", which is satisfied by any type 'T'
// such that for values 'a' of type 'T', the expression std::hash<T>{}(a)
// compiles and its result is convertible to std::size_t
template<typename T>
concept Hashable = requires(T a) {
    { std::hash<T>{}(a) } -> std::convertible_to<std::size_t>;
};
 
struct meow {};
 
// Constrained C++20 function template:
template<Hashable T>
void f(T) {}
//
// Alternative ways to apply the same constraint:
// template<typename T>
//    requires Hashable<T>
// void f(T) {}
//
// template<typename T>
// void f(T) requires Hashable<T> {}
 
int main() {
  using std::operator""s;
  f("abc"s); // OK, std::string satisfies Hashable
//f(meow{}); // Error: meow does not satisfy Hashable
}

Observe the following errors even though the project compiles correctly:

CMakeLists.txt:

cmake_minimum_required(VERSION 3.20)
project(cpp20testproj)

set(CMAKE_CXX_STANDARD 20)

add_executable(cpp20testproj main.cpp)

Version information:

CLion 2021.2.2
Build #CL-212.5284.51, built on September 16, 2021
Runtime version: 11.0.12+7-b1504.28 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 10 10.0
GC: G1 Young Generation, G1 Old Generation
Memory: 10000M
Cores: 12
Registry: debugger.watches.in.variables=false, run.processes.with.pty=true
Non-Bundled Plugins: com.jetbrains.plugins.ini4idea (212.4746.57), com.markskelton.one-dark-theme (5.3.1), com.intellij.plugins.watcher (212.5080.8)