I'm using Tailwind and I've extended my spacing to use a decimal point.
'0.5': '2px',
And I'm applying it in the less file.
@apply mt-0.5;
And it's failing saying "The 0.5 class does not exist."
I finally realised it's a LessCss problem. Change the @apply value to ~"mt-0.5" and it all works again.