Not sure if it is an actual bug, but...
So I made a clock loop with a torch and repeater at 2 ticks, and when I place
the torch LAST, it acts like a bud switch. The only thing is, that it is only in this exact position, and before it you need to set the repeater at 1 tick until the torch burns out, then set it to 2 ticks and destroy and replace the torch.