It could be that the IC is bad, or it could be that the IC is somehow improperly connected causing it to not function correctly. In other words, it’s not a 100% sure way of saying the IC itself is bad
If you’d like more help debugging the Timmy or any other build, the best way to go about it would be to post the layout, photos of the top and bottom of the board, and voltages in the debugging section of the forum