I created a Feed and imported Test Data. The Last Import was with the Timestamp 1744638590 and value 300.
Home Assistant synced the change and in the Home Assistant Feed Atribute i can see the correct timestamp under LastUpdated but the Graph show 15:50:25 for the change not 15:49:50.
Screenshot is attached did I miss something here ?
There is an oddity in HA in that there is a Last Updated and Last Changed value under the hood for every sensor. Last Updated is the last time the sensor was seen. Last Changed is when the state of the sensor changed.