To reproduce:
1. Open sample project
2. Open awake-bug scene
3. Make note of the script execution order. Both tester and master scripts should be executed before the default time and master should be executed before tester.
4. Run play mode and look at the console, the awake call for tester gets called before master.

Note: this can be fixed by moving gameobject test from its parent hierarchy. This also does not occur when tester execution order is set after the default time. This seems to occur only with prefabs.