For example here:
http://www.villagreta.pl/warto-zobaczyc-dolny-slask/dobkow-atrakcje/
or here
http://www.villagreta.pl/warto-zobaczyc-dolny-slask/gory-kaczawskie/
Every page that have map.
I just found that if page with map is open first time, this circle is spinning, but when I reload it again it will finish loading as expected.