MPC5643L Sensitive to CAN Bus load despite Masks

[michaelcoury]

Despite our best efforts, our MPC5643L implementation is sensitive to CAN Bus loads starting at about 40% Bus load at 1000 K.  Obviously this doesn't make sense as we are using the Masks to block all but one message.   Has anyone had similar experiences? Conversely, Is anyone successfully running at very high bus load?  

Thanks in advance,