Seafile server 6.0.6 view on cloud problem with Safari

Hi everyone!

Our Seafile server is installed on CentOS 6.5
Recently we have updated our Seafile Server from 4.1.2 to 6.0.6 and after this we got a problem: When we use "view in cloud’ (on desktop client) on Mac with Safari as default browser, we get just main libraries list, instead of files list in specific library. If we change default browser to Firefox or Chrome - all works fine.
We have another Seafile server with 4.1.2 version. On this server all works fine with the same client (on Mac with Safari).
Safari version: 10.0.2
Seafile client Mac: we tried 5.1.4 and latest 6.0.0

Any thoughts?

Regards.

Addition: Just tried on server 6.0.5 - and everything works fine!