I look towards autoprefixer. It has been updated. And in my project only you and postcss-preset-env use it. But the problem may be due to another package.
The problem is shown in the screenshots below. I also attached two yarn.lock files - before and after the update.


Comparison of two yarn.lock files
It can be seen that some of the styles work.
And judging by what I noticed - styles with a colon symbol do not work:
xs:text-xl
The code is present in the .css file. But the inspector in the browser does not see these styles for the elements.
Weird! Can you share the fully compiled CSS file?
Definitely a real problem, related to this:
https://github.com/postcss/postcss/issues/1304#issuecomment-545941419
Working on it now 馃憤
Fixed in PostCSS v7.0.20 馃憤馃徎
Most helpful comment
Definitely a real problem, related to this:
https://github.com/postcss/postcss/issues/1304#issuecomment-545941419
Working on it now 馃憤