2021 Roosevelt Dime - Possible Mint Error Or Post-Mint Damage?

Hello everyone,

I recently found this 2021 Roosevelt dime that looks very unusual, and I would appreciate your opinions.

The coin has an irregular, almost polygon-shaped outline all the way around. What caught my attention is that the reeded edge appears to follow the distorted shape instead of looking crushed in only one area.

Here are my observations:

* Date: 2021
* The coin has not been altered by me.
* The edge is fully reeded.
* The thickness appears very close to a normal 2021 dime.
* I compared it side-by-side with a regular dime, and the thickness is nearly identical.
* The shape looks consistent around the entire coin rather than a single flattened impact.

I've attached photos of:

* Obverse
* Reverse
* Edge
* Side-by-side comparison with a normal 2021 dime

Do you think this could be a genuine mint error (such as a collar or striking error), or is it more likely post-mint damage?

Any opinions would be greatly appreciated. Thank you!