Editor menu falls behind website modules:
Each element lays on its own "layer", defined by
z-index parameter.Too much layers cause Editor menu to hide behind some elements on the page.
This is Parallels Presence Builder internal issue PPB-4349 which has been fixed in Plesk 12.0 MU #29 and Web Presence Builder 12.0.7.
Apply latest Plesk microupdates .