Canadian Penny With Interal Voids. Error / Defective Coin?

Hey guys, I came across this 2001 zinc penny.
What is odd about it, is that the missing chunk appears to be a defect in the metal.

You will also notice, the coin has a few pinholes as well.
Some of these pinhole have an area around them that looks like it's ready to "cave in"
(The pinhole at the stem of the maple leaf for example. You can see a circular area around the hole that looks "hollow")

Also look at the closeup of the Queen's crown. The ornament in the center is "caved in" and also has a pinhole that exposes a hollow void. (Like a bubble in the zinc)

The coin does NOT appear to have aggressive corrosion that eats these coins. That type of metal eating corrosion would be fairly obvious.

The missing metal at the bottom just appears to have "let go" perhaps after being dropped etc.

Would this be considered a "split planchet" or something of the like? Is it an "error" coin.

Thanks for your time.
*Note I posted this in another area-wrong forum, my apologies for the double post*