A bit more info on this forum: https://www.minecraftforum.net/forums/minecraft-java-edition/redstone-discussion-and/3035899-redstone-cutting-corner-chages-pulse-sequence#c3

So I was creating a sequnce of pulses with observers On/Off/On etc. to create a binary system with redstone pulses however if pulse was 1/0/1 or 1/0/1/0/1 etc after the pulse from Redstone -> Repater -> Repater -> Redstone merges with one another and creates a single loger pulse. This seems to be the case in 1.15 as well but not in MC 1.0 so i persume this is a bug, you can find more pictures on the linked forum but here is the basics of it in photos...