Hi
It looks like they’ve changed the code again to check for timeout:
Forced reflow while executing JavaScript took 1897ms
https://coord.info/GCA12P2
108 pieces

6275: ;function cQ(y, L, P, x, m) {
6276: for (var t = 0, b = 0; b < L; ++b) {

b=L (gives 108)
error:
Unchecked runtime.lastError: A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received

and on continuing:
The jigsaw puzzle could not be restarted. Please try again…