Just realized this last night, they never disable unlike all other objects in my Vuforia scene. If they are visible at start of experience I see them floating before the target has been reco'd, and if i lose tracking they freeze in place on the screen.
Is this a known issue or is there a workaround, I've googled and couldn't find any mention.
Text mesh is indeed a child of the image target - what's strange is that some of the TM's (that I have animated doing something else) apparently ARE disabling, I just noticed late last night. I don't know what I did to them that is different, other than animate their opacity at some point during the experience. I'll futz with it some more and report my results back in this thread over the weekend. Thanks again for your help-