I did a lot of training this winter on my indoor bike with power meter. I also used a heart rate belt. When I did a outdoor ride to my office in this time, I got a training load of about 50. Like this: https://intervals.icu/activities/5164702612
Then I had some weeks without (or just little) riding. This week, I began riding to the office again, but for the same time, distance and effort I get just half the load now. Like this: https://intervals.icu/activities/5427790035
You have it set to “Time in zones” in /settings for Ride. This works well if you have lots of good (long) rides with power and HR. It’s not doing very well for you. I suggest changing to HRSS. That depends on your resting, threshold and max HR only and should give better results.