Randomized header is not working


After I installed Polylang, the randomized header of other pages are not appearing. When it is on the static setting, the header is appearing and when I choose “Randomize uploaded headers” it is not appearing.

My website is www.wildlifemongolia.com

Please help me on this.



I am not sure what cause it but hope this css code below can fix it:

.header-image {
    display: block;

img.header-inner {
    display: block;
    height: inherit;


still the same. Randomized headers are working fine on English pages but not displayed on Japanese pages.

Do you have any other opinion on this?