LG TinyMCE & text search in control panel

Search utility in EE control panel (Edit tab) doesn’t search in LG TinyMCE fields even though I specified “Search titles and entries” and search is set as searchable in definition (Custom Weblog Fields).

Website search (Search Module) works fine.

I’m using EE (v1.6.8) + LG TinyMCE Custom Field (v.1.1.5).

Has anyone sumbled upon this (and ideally solved it)?