Sometimes classes is added to another element when clicked on

I've ran into this problem now and then: when I've added some Tailwind classes to one element and then select another, the classes sometimes get added to the other element.

Start by reproducing the problem while adding Tailwind classes to one element and then selecting another. Document the exact interaction and determine when the class update targets the wrong element. Done means classes are applied only to the selected element and the regression is covered by a test if the project has a relevant test entry point.

Written by the indexing model from the issue text.