backticks doesn't work with conditionals?

Hi!

Let's say I have the following lines in my screenrc (screen itself is the latest master from https://git.savannah.gnu.backtickorg/git/screen.git):

    backtick 1 0 5 procs
    backtick 2 0 3 cpumem
    caption splitonly "%?%F%{xc6c6c6;x000000}%1`%:%{xff0000;x000000}%2`%?"

Which I'd expect would display my "procs" backtick No. 1 in my focused window, and my "cpumem" backtick No. 2 in my non-focused window. However, this is not happening, only "procs" backtick is displayed in both windows (and in both cases it's drawn in the same color, gray on black).

Now, if I change the caption string to this one:

    caption splitonly "%?%F%{xc6c6c6;x000000}abc%:%{xff0000;x000000}def%?"

then everything works just fine, the string 'abc' is displayed in my focused window, with gray on black, and the string 'def' is displayed in my non-focused window, with red on black.

Is this a known and/or an expected behaviour? :)

Thanks in advance.



-- 
JD