To quote eishiya from the Tiled forum:

When highlighting a layer, have an option for a light colour as the fade colour. The dark default doesn’t work well with dark tiles, as they blend in.

Could probably be added alongside the grid color configuration.

I am sorry, that might not be a bug, but i am stucked :( Was trying to google or find more info on that problem for 2 days.
I have an http get method in my project that returns an array of objects like this:

[ 
    {title: "Title1", id: 5, city: "City1"},
    {title: "Title2", id: 3, city: "City2"},
...
]
myStream$ = this.http.get('/api/getData')

http is a casual Angular Http