Pb with ERT

[Olivier Meplan]

Hello
I have a problem with the new Lyx version (1.2.0 or 1.2.1) on RedHat
7.3.
All is working well...except the ERT mode: I can't convert a selected
word in TeX mode ; it just open a new ERT box after the selected part of
text. This was not the case on previous versions.
What is the problem and its solution ?
Thank you very much
Olivier Meplan