Safari 11 not loading updated CSS
When using Safari 11 for web development, it does not load the updated CSS. It sometimes help to press the reload icon in the Safari address box while holding down SHIFT, but not always.
It looked like it helped turning off all the options in "Settings for this website" in the Safari menu, but there are still problems.
This is a very weird experience to see Safari suddenly unusable for web development. Very frustrating.
iMac, macOS High Sierra (10.13)