Confusion about how to return to home page of app

Users affected
P20
P15
Outcome/Expected Functionality
SUGGESTIONS: 1) Use a different UI pattern to signal moving back to the home page quickly 2) As part of on-boarding, highlight functionality of this arrow.
Type of issue (10 usability heuristics)
Flexibility and efficiency of use
Ease of fix
Challenging
Severity
Major
USER EMOTION: Observation
CONFUSION: Users did not realize that the small "back" arrow on the left of the blue top banner was a shortcut which allowed them to return to the home page quickly. Most users relied on their phone's hardware back button, which only allowed them to go back one screen at a time, and only discovered the functionality of this arrow after repeated prompting.
Feature(s) impacted
General