Original poster here. Definitely appreciate all the conversation. Revisiting my training log I’ve come to realize I need to pay more attention to:
1) staying in correct zones. I was often in Z2 all the time instead of doing some Z1 and Rec as well
2) pay attention to fasted workouts – realize I need to be more cautious with these and just introduce them slowly over the next 3 months. I was inadvertently doing all but the longest workouts fasted. I now make comments in my workout log to note this.
3) ramped up volume too quickly to ~10h/week when I should have been around 7-8 at that point.
4) may try 2:1 recovery as well but will monitor the above points and perhaps I can stay with 3:1.