Thank you! Problem solved after theme upgrade!
Of course:
WP 4.5.2
Theme: Flymag https://pl.wordpress.org/themes/flymag/
Browser: 50.0.2661.102 m
Windows 10.
p.s. Now I test it with Mozilla Firefox 46.0.1 – the same problem.
I have Getty Images 2.4.3. and the same problem 🙁
Thank you very much, all answers are very helpful!