Yes. Was fine for a couple of months, then retracted suddenly.
I had an Alk spike a week before it happened. I made a large water change (200g) with RC that was unusually high in Alk. I also increased salinity during that same WC to compensate for a skimmer malfunction.
Nothing in the tank was negatively effected. The RBTA was out during all of this. Then a week later - it hides.
It technically 'looks' healthy and the clowns are still tending to it.
I did add a small gorgonian that was about a foot away from its base disk. It's tentacles would sometimes get out that far which made the gorgonian close up the polyps on that side. But no visible damage to either.
One last thing I can think of- my powerhead angle shifted a little causing some turbulence in the middle of the tank (the RBTA is one the far right), but it seemed to like the secondary flow coming back from it. I adjusted that back when I saw it hide.