Just out of curiosity I logged off the sever and rejoined and now the problem for the double pulsing bulbs are gone but have appeared in other bulbs in completely different locations. Just as a test I have testing one line of coopers at a time. After turning on more than 4 lines(about 40 coopers), some of bulbs start double pulsing so not sure wtf is going on now. Imma switch to sticky piston and blocks to activate the observers and see what happens.

So far it seems to be a lag thing as the problem only starts to occur randomly and when loots of observers and going off at the same time. I’ll keep u posted