This has always been the case, in both 2014 and 2016 (the only SW versions I am familiar with).
Is there a reason why it should move L/R? It seems to serve only to irritate me, but maybe there is some useful purpose that I am missing. Perhaps it's a feature, but I don't understand its value.
Is it possible to prevent it from doing the Left/Right movement? That would certainly be less irritating.
Windows 10 Pro