This is second had. but I've heard it a number of time...When it was announced at Bell that Boeing would not be partnering with them on FLRAA, there were cheers among those affected. The reaction at Sikorsky was less than thrilled. Boeing already had Til-Rotor knowledge from V-22, Defiant was a way to grab some X2 technology smarts from the inventor.
Remember, Boeing used to be an aviation company. Now it's a financial conglomerate one of who's revenue streams just happens to be aircraft. And if you look to where they've most recently moved their headquarters, they may no longer be that.