Message+ unable to disable split keyboard in landscape?

[STARRYVACANCY]

I used to have this disabled. It's now magically re-enabled.

Googling this tells me to look for the option under Keyboard Height and Layout, but the option to disable split keyboard isn't there anymore.

Insight?

[scottseigle]

Place a finger on each of the two split spacebar keys and drag them together to make one spacebar key.  The rest of the keyboard expand to fill empty area.