http://bugs.winehq.org/show_bug.cgi?id=58095
--- Comment #8 from KRosUser kyle.kcsoftwares@gmail.com --- Here comes the understanding of the issue and a proposed solution: https://github.com/reactos/reactos/pull/7886
"EDIT_EM_GetHandle unlocks the handle, so the next EM_SETHANDLE handler shouldn't unlock the unlocked text."