30 pistons de-/activated by redsone: no lag 30 redstone lamps de-/activated by redstone: lag 15 redstone lamp pairs de-/activated by redstone: bigger lag
The lag caused by deactivating is quite bigger than by activating.
I have the same problem since 1.10. The mobs are walking through fences by a chunk unload/load. I cannot reproduce the problem with F3 + a, only with going away and coming back.
I have the same problem with 1.10.2.
30 pistons de-/activated by redsone: no lag
30 redstone lamps de-/activated by redstone: lag
15 redstone lamp pairs de-/activated by redstone: bigger lag
The lag caused by deactivating is quite bigger than by activating.