A number of books have quoted Tracey’s story on this - and I think I recall him mentioning it on TV. What he basically said was that in general the visitors to Scott’s when he was leading the house trio were a delight to play with but with these two musicians (plus Getz I think) the on-stage vibe and attitude was extremely unpleasant - deliberately so. Great professional that he was, Stan put up with it and put two fingers up in return in his interplay.
Getz of course, true to form. Didn’t Ronnie say he nearly broke his back bending backwards for Stan Getz?