High frequency redstone machines too slow in Minecraft Bedrock 1.20.0, but they are working quickly before 1.20.0

My friend and I built some redstone machines in our survival level in 1.19. The machines uses 2 observers to make high frequency redstone signal.

They work quickly in 1.19, but they slow down when the game version upgrade to 1.20. For example, there is a machine to get some gold ingots from zombified piglin, but now it can't work because it works too slowy. And there are some blocks (for example, the nether portal, the nether rack from the machine) can't show at the same time.

Please fix the bug right now.