I'm using PhpStorm over 3 months and it's a good IDE. I do not know what I've clicked yesterday but since yesterday I have issue with code completion in CSS mainly.
On the screen I have VS Code and PhpStorm and also I've opened the same project.
In VS Code it works perfectly. In PhpStorm it doesn't. I tried some Google First Aid like clear cache, update the IDE, turn On/Off Safe mode etc. but nothing changed.
My Code Completion settings: