Well, there was a reason, in fact. My JFK-AUH-MUC award booking-- w/ ticket # issued-- departing this weekend-- was cancelled unilaterally by AA according to EY's extremely helpful phone rep. I asked how/if/why maybe some other glitch might have occurred, but, nope-- at least according to EY-- AA cancelled it.
Been DMing AA via twitter last 24 hours and they've been assuring me all is well.