Highlighted Applescript text is not visible

When I select text while writing an applescript action that text appears to be invisible rather than highlighted.

Perhaps this is a feature request--it seems more like a bug--but I often find myself de-selecting text to remind myself what text I have selected.

The bug occurs using the latest alpha version of BTT v-2.705 (and prior) operating macOS Mojave 10.14.2 on my MBP 15" 2017.

Photoshop'd example attached.