I had an 4.8 over under workout scheduled today. I went for an easy 20m walk at lunch which I recorded on my watch and it auto synced to TR. When I went to do my workout later in the day it was swapped for a much easier workout. When I delete the walk from TR, the workout went back to the originally scheduled 4.8.
Q: is this a bug? Should I stop syncing my walks to TR?
yes. I’d stop syncing anything that isn’t having an negative impact on your training (causing fatigue). So you can sync walking, yoga, stretching, etc., but it’s not going to improve your training plan and just creates another variable that the Ai has to try to interpret.
I’m not sure if it works the same way or not since I don’t log walks as workouts in Garmin, but for runs, TR will calculate an estimates TSS number (fraught as it may be), so, if it’s adding tss for walks the model is probably seeing it as additional fatigue.
I’d stop syncing them unless they’re real vigorous 
Someone else did an experiment and found that TR only seems to recognize TIME running, not RPE, so if you run 1 hour, regardless of if it was Z1 or All Out, you get the same fatigue registered, so really, really, really, take it with a grain of salt and listen to your body.