Here is how it looks like.

Thank you for your bug report! This issue should be fixed in v1.3.0 which was released today.

Wow... that was quick... sadly I just found another bug related to tiles so I'm posting it there.
It's a weird visual glitch this time on the side of the tile. As if pixels tried to fight which one should be visible:

It's difficult to show this on picture, you have to place tiles and look into them in game.

@SpiderKolo thanks. I've opened a new issue for this bug here