The circulating current caused by current through the "snubbing" device causes a delay until it has collapsed.
I have never found it a real problem on simple devices where a few μs make a difference, contactor coils or hyd solenoids etc, , some times it can be seen in large DC brakes or clutches etc.

 

Just for the sake of knowledge, how?

It's a very interesting phenomenon,
when the "Armature", or other moving Iron part, in or near a Coil of Wire "moves",
it induces a Voltage in the Coil.
A return spring can easily cause a very rapid movement in that part.

If there is very little, or no Load, creating a Circuit back to the
opposite terminal of the Coil, the Voltage may spike extremely high.

But if you "short-out" the Coil,
that Voltage Spike instantly becomes an opposing Magnetic Field which will
try to resist the motion of the Iron part,
sometimes with a surprising amount of force.

This has the effect of "slowing-down" the otherwise fast moving Iron part.

This can easily double, or even quadruple, the amount of time it takes for
a Relay-Contact, or a Solenoid, to return to its resting position.
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