Fill command in command block And the Tick Delay

Version 1.20.51.01

the command block is not working properly with the "Fill command" when i use the button for it to function theres fill words comming out from cmd block out of nowhere and the delay tick is not working properly like the 5 sec was suppose to be 100 tick but in the cmd block its like too much delayed.

 

at the screen shot i sent there's the fill after the air that the problem

after i click the button thats always there