So, to make a monoflop successfully working, you must handle it like an analog chip. You must put it at a quiet place on the board and must filter the inputs and supply voltage.
If you read Kai's post above, you will see that if you put it in nice PJs, place it on a soft foam bedding and air condition the room in which the one-shot rest, it MAY behave.

I don't see monoflops as bad as Richard and Erik.
You can approach the use of a one-shot two ways; a) go out of your way to get to where it MAY behave or b) not use them. Kai (with his extensive knowledge about noise avoidance), evidently has chosen option a) whereas Richard and I have chosen option b).

Personally, my attitude is that it is not worth the effort to go out of the way to use a marginal component when a non-marginal component (a shift register) exist and that solution is just pennies more if that.

Erik