Update affecting other entities

When I update a single "Load" it somehow updates data in the "VehicleOrders" table.

I'm trying to figure out how this is possible...

Vehicles is null in the "Load" I am updating, so how can it even get to "VehicleOrders"?

I’m afraid that I can’t provide any additional info from provided information. You can check official Microsoft documentation on how EF handles CRUD with relationships:

I understand, it's just very odd to me, I'll figure it out hopefully.

updating Vehicles causes problems too