1.Make sure fast charging is activated. (Settings >Device care >Battery >Charging >Fast charging.) 2. Make sure charger(and cable) works well in other devices. 3. Wipe your cache partition.
Are you worried about an additional 10 minutes taken for full charging? This can be because of the change in usage pattern or because of any kind of SYNC service running during charging. There is nothing to be worried about unless this issue is accompanied either by overheating or low battery backup.
