Update battery percentage in app

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/update-battery-percentage-in-app/
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When using the app on the phone during a trip I have the option to push the + or - buttons on the screen to match the percentage in the app to the percentage in the car, however when I press the buttons they very seldom work and sometimes I need to update the percentage by several percentages, but I can't get that to work.
I'm using the app on a OnePlus Nord.