Parent constraint not working as intended after leaving the spawn area

[trainchasewastaken]

This was tested on the Workshop version.

[InfMap2 - Infinite Map Base] lua/infmap2/isv/constraints.lua:152: Tried to use a NULL entity!

1. IsPlayerHolding - [C]:-1
2. ContraptionHeldByPlayer - lua/infmap2/isv/constraints.lua:152
   3. v - lua/infmap2/isv/wrapping.lua:167
   4. unknown - lua/includes/modules/hook.lua:102 (x604)

Parented props also appear to not render correctly after leaving the spawn chunk. Parented seats can still be interacted with, but they seem to send the player out into the distance.

Parenting tool used: https://steamcommunity.com/sharedfiles/filedetails/?id=111929524&searchtext=multiparent