MP Fault Tolerance - unexpected behaviour @Fallback method calls with @CircuitBreaker

MP FT does not behave correctly in case when there is @CircuitBreaker, @Fallback, @Retry and @Asynchronous on service method. @CircuitBreaker does not get opened based on its configuration and @Fallback method is called with incorrect value.

Test scenario:

• Deploy MP FT service with:

  @Asynchronous
  @Retry(retryOn = IOException.class)
      @CircuitBreaker(failOn = IOException.class, requestVolumeThreshold = 5, successThreshold = 3, delay = 2, delayUnit = ChronoUnit.SECONDS, failureRatio = 0.75)
      @Fallback(fallbackMethod = "processFallback")
      public CompletionStage<MyConnection> retryCircuitBreaker(int counter) throws IOException {
          System.out.println("retryCircuitBreaker - called - " + counter);
          if (counter % 4 != 0) { // 3/4 requests trigger IOException
              System.out.println("retryCircuitBreaker - called - " + counter + " throwing exception");
              throw new IOException("Simulated IOException");
          }
          System.out.println("retryCircuitBreaker - called - " + counter + " success");
          return CompletableFuture.completedFuture(new MyConnection() {
              @Override
              public String getData() {
                  return "Hello from @Retry @CircuitBreaker method" + counter;
              }
          });
      }
  
      private CompletionStage<MyConnection> processFallback(int counter) {
          System.out.println("processFallback - returned url counter: " + counter);
          return CompletableFuture.completedFuture(new MyConnection() {
              @Override
              public String getData() {
                  return "Fallback Hello" + counter;
              }
          });
      }
  

• Sends 16 parallel requests. Every 4th requests pass (including 0th one as there is modulo 4), and 12 invocations fail on IOException.
• Try on more request and check that @Fallback method was called as circuit is open

Expected result:
Circuit gets opened and @Fallback method is called.

Actual Result:
Circuit is not opened and @Fallback method is called.