Other bug I found:
This bought "IN" is staying on the board even when I remove it, it's not game breaking, I can move it and it will be considered placed but if I click it or right click it stays there with a shadow below it. I have the +1 hand size perk if it matters.
By the way this game needs the ability to see the board once the game is over and also a log to see what triggered what:
at the end of this game I used the backwards spelling perk to spell "DENS" and it turns out "SNED" is also a word so both counted and both were vertical and both retriggered so I unexpectedly completed the final round in a single turn by placing down 2 tiles, it would be cool to see the math/reason behind how many points you get.