Hello, I did some testing, and arrived at a possible solution.
In .env file (located in htdocs) there are two settings in the beginning of the file:
\ ---------------------------------------
\ Application Settings
\ ---------------------------------------
APP_ENV = local
APP_DEBUG = false
I realized that if APP_ENV is different from "local", ie "production" the trace is not entered in error JSON.
Note: After changed to "production" did some testing, and only thing that changed was the addition of trace in the error messages. If something else changes, let you know.