Rem Tag along item buff does not persist for duration items.

[CommissarTyr]

When using Tag Along with the upgrade to increase item range, Items will have the increased range only for the duration of Tag Along. Leaving Tag Along will not change the visual for the effects, but the radius will be reduced to normal.
Applies to most items with persistent durations.

Example of Scourge not changing visual. McGinnis is not being damaged.