Tick commans need power for that tick time!

I have a command block, this command block is using an execute command and has a delay of  50 Ticks before It randomly sends a Redstone_block to a specific "cord". In order for it to work unlike usual. The command block needs to be powered for those 50 ticks, If at any moment its unpowered for less than 50 ticks the command wont execute. Ill add on it does work when "repeating" though, the command block in its normal state is impulse needs redstone! This is breaking my adventure world of which im somewhat self taught and been working on for over 5 years!