[This happens when the first object is assigned to null]

Steps to reproduce the issue:
1. Open attached project.
2. Open scene named "Default".
3. Enter the play mode.
4. Notice the output of the "Console" window:

foo equals bar: True
bar equals foo: False
List item 0: bar

Actual result:
"object.Equals(objA, objB)" returns true if objA is pointing to null despite the fact that objB is not pointing to null. This might cause unexpected behavior when removing a specific item from the list. Yet, if objA is not pointing to null and objB is pointing to null, the output is correct.

Expected result:
"object.Equals(objA, objB)" should return false if objA is pointing to null and objB is not pointing to null.

Reproduced with:
5.3.2f1, 5.3.5p8, 5.3.6f1, 5.4.0f1, 5.5.0a3.