Changing IVA camera resets reference transform
Prior to 1.6.0, RasterPropMonitor and MOARdV's Avionics Systems could use Vessel.SetReferenceTransform(Part) to change the reference transform. This allows a player to select a Transform for docking purposes that does not align with the front of the vessel. As long as the player did not leave the IVA mode, this transform remained intact.
With the 1.6.0 update (maybe tied to the changes required to support more than one reference transform on a part), this reference transform is reset to the command pod as soon as the player presses 'V' to switch seats in IVA. The bug will not reproduce with a stock KSP installation, since the stock IVA experience is minimal. I will happily provide links to the components and details required to reproduce the issue if it will be addressed.