I have (a somewhat stupidly made) item elevator, with hoppers running up in a pole, I have repeaters running into the pole every other block, and sometimes the power will spread only down, or maybe it will spread up 2 blocks instead of 1, and it seems to change every now and then, because I need to readjust the redstone placement every time I log… 🙁

But on the bright side, redstone is definitely less laggy!