The logs look a little bit unusual, have changes been made to the library? I can’t help with the issue under request because it is being tested with the simulator, unfortunately – can you test on a real device and see if you still have the same problem? A good piece of general advice is to make your keyword that you want to spot a little bit longer/more unique, e.g. instead of:
NEXAR N EH K S AA R
You could try something like:
YONEXAR Y OW N EH K S AA R
and the user can say “Yo, Nexar” (replacing with your preferred address for your product). Two syllables might be a bit too brief.