I’d say for at least the past week, it feels like it it can take forever to charge my iPhone over 60% and it takes longer to get over 75%. I work from home so that’s not a problem as such but feels like it gets warmer while charging, the phone drains quicker too. Then today I got some sort of alert about high CPU usage while I was out for a walk. Turning it off / on didn’t seem to help much but force-quitting apps did. Whatever causes it is not entirely visible from the daily usage graph.