Pulp tile copy numeration bug

When you copy a tile in Pulp a number is added next to the name. Which is fine until it reaches 19, when the next tile is numbered 110, not 20. Then the 30th tile won't be 120, but rather becomes 1110. I've noticed this issue for a while now.

To reproduce:
Copy tile "N" 30 times.

What happens:
The copies are numbered "N 2" through "N 19", but then "N 110" though N 119" and then "N 1110".

What is expected:
The copies are numbered "N 2" through "N 30".

(And yes, if you copy it ten more times the new tile is called "N 11110", then ten more it's "N 111110", etc.)