Ya, it's actually the LPM which doesn't like overclocking on some boards, especially the 13.5 machines or older 14TH.

I plan on putting some more work into finding a solution for this in the following weeks, until then, the best solution for LPM is
the original firmware on bitmain without overclock.

There are some users which were lucky and it worked, so always test on a few machines before mass deployment.