We have the same exact issue, thank you for investigating and posting it here. I can now sleep at night again. 
Since we’re using pre-compiled version of the engine we had to disable seamless travel altogether and now waiting for new patch.
We have the same exact issue, thank you for investigating and posting it here. I can now sleep at night again.
Since we’re using pre-compiled version of the engine we had to disable seamless travel altogether and now waiting for new patch.