Yes, there can be a race condition where the data that was requested by http.get is not return in a deterministic order. As it’s a request to the server, it’s dependent on many conditions that aren’t controlled by the engine. Eg. Size of file, network issues, server speeds etc.
It is possible to request:
Resource 1
Resource 2
Resource 3
Resource 4
And get back the order of
Resource 3
Resource 4
Resource 2
Resource 1
It is the developers’ responsibility to ensure that avoid situations where the order matters and only handle the response once everything is ready.
Eg The engine preloads assets and waits until they are all loaded from the server before starting the app.