Removing 2 or more rules does not retract justified objects

When removing rules from knowledge which have logically inserted (justified) objects, only one object (from first removed rule) will be retracted.
In example from AddRemoveRule#184: as it removes the first rule, it re-initializes all other path memories and, in particular, marks them as unlinked (AbstractTerminalNode#204)
Later, when it tries to flush the deletions (AddRemoveRule#280), the unlinked status prevents the propagation from taking place.