"There are task errors" while typing in tasks.json

- Have a task like this: ```json { "type": "npm", "script": "web", "label": "Run web", "isBackground": true, "presentation": { "reveal": "never" } } ``` - Add this ```json "problemMatcher": { "background": { } }, ``` - Get a warning popup immediately, "There are task errors. See the output for details" - I'm still typing, I know there are errors, it should leave me alone for a minute or until I close the editor