Board Game Arena

I am very confused about the anvil tile. I am playing a couple different games and in one of my games the narrow side of the anvil tile is on the right and in another game the narrow side of the anvil is on the left. See the screenshots from board game arena:


I searched google for images of the piece in the physical game and I can find images of both shapes existing in physical game:


I feel like I discovered a glitch in the matrix, what is going on here?

Isn't there a mirror option in tile rotation ? If so, one version could be mirrored into the other.

I am not aware of any mirror option. I thought maybe the piece was two sided but my research indicates the back side of the tile is blank.

EDIT: Thank you this solves the mystery and now seems obvious. I searched online and thought it said that the back side of the tiles was blank but this makes much more sense. Is this the only tile in the game that isn’t symmetrical?

All expansions included there are 9 chiral tiles.