We are fixing the rare bug that makes the highlighting switch on to black, to give a black bar of text. This should be done soon. I has proven more tricky than seems possible for such as small error in display.
It is easy to work around by highlighting text and setting the highlight color to whatever it should be (it seems to do it for initial white/black combi only).
Anyway thought I’d let you know! A new version upgrade will be here when it is fixed.