installing cubiq/ComfyUI_essentials via manager results in missing nodes. as opposed to "git clone"

i kept getting errors of some missing "essentials" nodes in workflows, despite having updated to latest. only after another user found this out i got it working:
> I've found that if you clone manually https://github.com/cubiq/ComfyUI_essentials, it would have the SimpleMathSlider node in it, the version installed by node manager for some reason does not have it. (Check [misc.py](http://misc.py/), it should have "class SimpleMathSlider" in it)

i deleted the custom nodes folder ComfyUI_essentials and manually git cloned. and voila no more missing nodes
why would installing via manager not be the same as git cloning repo?