Redstone clocks (The 4 repeater version of them) breaking when you exit the chunk

When i put a redstone clock in my redstone contraptions it would randomly break rendering it completely unreliable and useless. The way it happens is when i go out of the chunk or several chunks away so its not rendering anymore, after a while it would be (most commonly) fully powered and not sending any redstone pulses. Sometimes on rare occasions it would stop the other way around. It would COMPLETELY turn off. I am not 100% sure if it is because im exiting the chunk since it has happened once i exit out of the game too, but i think i am on the right track. Mojang, could you please fix this redstone bug? Redstone clocks are too essential to be ignored, thanks!