Teleportation at Death - Land vs Water
I am offering conjecture here... so please understand I am offering only something to consider.
1. If you surround your start points with solid structures on land - like the docks - you will suffer rotor crashes.
2. Teleportation across land is the movement across a 3d structure with a skin.
3. Water appears to be simply a skinned elevation.
So I am wondering if the Comanche is not traveling from the point of death to respawn at a minimal elevation above the terrain, and experiencing the rotor crashes when it travels from the 'bottom of the body of water' up and through the dock to get to the start marker.