Short Answer: KentuckyKen suggested I reboot my car (by disconnecting 12V battery) after I described unusual behaviors. My car seems to have greatly improved after "reboot." I no longer get angry bee events at all.
Long Answer:
So I was one that mentioned angry bees a bunch and then became quiet. I have a theory of what happened to my car:
1) I did not have service bulletin updates related to charging (i.e. 18-079 or 18-097). One of my first trips I drove a few hundred miles in the new car (to Crater Lake NP as it happens). They have a free level2 charger there. I tried to charge. I got the system power warning. It did not clear on this trip at all. I may of drove home in 100% gas-only mode and man did that drive suck. Regen didn't work, a message indicated the electric system was locked out. i.e. see the dealer. I drove home anyway. I don't know if this whole backdrop is related to problems I saw.
2) After the errors cleared, car worked mostly normally. My weekday commute is all electric, and that part didn't seem affected. Riding in HV mode, I'd lose 1 mile of EV range for every 3.5 miles driven. i.e. My 109 mile trip to Portland would exhaust EV range to 0 even driving in one-trip in HV mode.
3) My car *used* to get angry bees every time I hit 0 EV range, which due to 2), happened on every longer trip.
What I've noticed and why it took so long to learn:
- My car now performs great. Since the reboot, my HV range may drop a few miles, but nothing like before. i.e. i can now drive 109 miles and yeah, I'll lose 3 EV miles or so, but I now retain EV range in HV mode.
- I was paranoid for a long time not to allow EV range to go to zero because of the angry bees problem I once routinely experienced. I now occasionally hit 0 EV and there's no angry bees. The engine does sound (normal) but like its working harder than when I have 0 EV range left. So I still try to avoid 0 EV range, but I have not had any angry bees events since reboot.
I would not recommend everyone reboot their car (the disconnect 12v), but I would tell folks who have odd problems others don't see to try it.
Other complicating factors: When my car was behaving oddly, I didn't know what is odd and what isn't. The car was new to me. I just knew my experience didn't match folks in these forums. I am very grateful to all the help received in these forums. -Dan