This is a problem I have with the latest framework 2.0.17, but works with 2.0.11.
The simple description is that the trickle button don't show after a question. See screenshot step 1-4.
If I size down the window to mobile view (Step5) it works though.
Trickle version 2.1.3, Assessment version 2.0.6, AssessmentResult version 2.0.4
Some things blurred in the images for my customers privacy.