Value Mapping not working


I*ve configured a “Single Stat” app for a value I’m getting from a influx DB. Showing the pure value works fine.
The value can be an Integer from 0 to 4.
The query:
SELECT “water_pressure” FROM “heating” WHERE $timeFilter
At the moment, I’m getting a value of 1. So I added a mapping for 0 -> Standby and 1->heating
But the app is then showing “standby”.
Any clue what I’m doing wrong here?