Trouble with 787 Autothrottle

I’ve flown the 787 quite a lot and I’ve not done so in awhile. Today, I took a flight in it and the autothrottle would simply not work, at all. I tried all sorts of things to get it to do so, but to no avail.

For instance, I’ve got it on altitude and heading hold, the AT Arm switches are on, the AT button is flashing (clicking does nothing), the PFD says SPD and I’ve got the IAS dialed to 250, but the throttles do not move on their own.

Has anyone flown this recently and had success with it?

For what it is worth, I’m on the AAU1 beta and Xbox.

Doing a forum search reveals old closed threads re: autothrottle not working. Is this some sort of regression or something broken by the AAU1 beta?

And like that, the very next flight the Autothrottle works.

Argh, this sim…