SBLGNT on iPhone - word definitions don't work for all words

I was reading Ephesians 2 in the SBLGNT on my iPhone app (1.6), and there were
several words that didn't give a definition when I pressed on them; all
that popped up was the option to search the Bible for that word or do a
word study on it. And when I chose the word study option, the responses
for Definitions, Hebrew Words, and Greek Words were blank. E.g.,
apêllotriômenoi (Eph 2:12) and apokatallaxê (Eph 2:16). 

Why aren't all the words in the SBLGNT keyed to definitions?

I got definitions for these words in the USB4/Swanson Greek NT.