If I type Psa 31 and add a space then click on it, it brings me to the top of the psalm including superscription as expected.
Type Psa 31.1 and it goes to 1
Type Psa 31.9 and it goes to 9
Type Psa 31.9-16 (as in today's reading for the daily RCL) and it goes to 32.9
I've reproduced it twice and don't understand the problem
Using windows 10, Logos 6.10 SR-2 with NLT as default Bible