Initial SoC resets to 90% on trip start

Today at 16:28 CET I planned a route with starting SoC 55%. Event log sent (bug button clicked) from an iPhone SE gen 2 at that time. As I started the trip the initial SoC reset to 90%.

This happened again for a different trip around 17:50. Event log sent from the same device. I set the starting SoC to 30% and started the trip. Again the initial SoC was reset to 90%.