Re: Menu highlighting bug on Windows 10?

I am showing the menu with a bar click.
Yes, I can navigate using cursor keys with the same result.
I have tried your suggestion of adding exec.showmethod(1) as startup alarm.  I have also tried adding exec.showmethod(1) as a command immediately prior to the menu show command.  Norhing makes any difference to the behaviour,  

As a workaround I'll probably redefine all the menus as sub-bars.  Sub-bars seem to be slower performance than menus but they have the advantage of more skinning options anyway.