This is not the answer to your specific question however I have been using trems of all sorts umm everyone that I can think of in my 32 years of playing not counting 4 years of lessons that I dont add when I was 8-12... when you say play!! you have to desctive a bit better

an easy way to do this is just grab your phone and make a quick video of the issue then post it wherever and put the link in...  Now even if it did ot have play... on most trems of this style the fix for getting out of tune is really easy put either a Tremsetter in or the new one the Box ahh something hell I just bought one I should remember anyway... what this does is insure that the toneblock always goes back to perfect "0" point I use it on all my Trems Fenders and Hamers and Schalers and Floyd roses etc etc... its great and they cost ya about 40.00 but it is well worth it if you do play out with a band and need to insure you stay in tune or are doing session work or musicl scores for film or TV... No rockstar you see has a Floyd Rose for example that at minimum does not have a heavy duty Brass tremblock heavy duty springs and some form of Tremsetter.. thats why Satriani can do insane even on his Ibanez bridge which is and advanced for of a Floyd Rose he also uses a tremsetter.. now if you just **** around at home it dont matter  but if you are recording yoru songs I would surly make sure that my guitar styaed in tune.. Some food for though on all Trems not just the JT bridge on the Variax hope this helps