I am developing new WP theme and it's in the phase of beta testing. So, it has succesfully installed and it's working on some sites. But, now there is one problem on particular host server. (shared hosting), on any domain I use. When I make changes in customizer there are occured and visible, but when I navigate in preview window to another page, for example: Sample page, changes made on front page are not registered but they are saved and shown on actual site link. When I do force refresh every change I made is shown properly. It seems there is issue with server, because everything works fine on another server. (and on localhost also) CSS is saved in special file using WP filesystem, maybe problem is with that, I don't know really.
Thanks in advance...
SK