Application 3S reset position issue, not Q2 or Q3

Hi,

I've taken over some in-house apks which we're working through upgrading. However, we've recently got reports of an issue with the 3S that when you reset your position in these applications, it not only resets the horizontal position, but also the verticle and tilt. Not only that, but this reset position is taken over for the whole device, so if you exit the game with a misaligned reset position, it remains in home. 

I'm looking to find whatever's doing this, as I suspect some issue with a script trying to reset to eye level, not floor level.  We've now tested on multiple devices running v72 and Q2 and Q3 are fine and reset correctly. The 3S is the only one that has this issue. 

My question is, what's different about the Q3S here?