I have had this issue twice
1) Battery full: Low speed drive for 2 miles, mostly stop and go. The car drove with ICE on like it does in HV mode. Would not switch to EV even with switching between ECON/Sport/HV
2) Battery full: Low (25 mph) to freeway (80 mph) speeds in sport mode car ran on ICE for 8 miles.
After turning off the car and restarting it EV mode resumed in both above cases. Perplexing
I got though this route everyday and it uses battery when available, but last couple days were strange.
1) Battery full: Low speed drive for 2 miles, mostly stop and go. The car drove with ICE on like it does in HV mode. Would not switch to EV even with switching between ECON/Sport/HV
2) Battery full: Low (25 mph) to freeway (80 mph) speeds in sport mode car ran on ICE for 8 miles.
After turning off the car and restarting it EV mode resumed in both above cases. Perplexing
I got though this route everyday and it uses battery when available, but last couple days were strange.