When you say power target of 58 or 65 do you mean that is the Watts target?
You didn’t say what your FTP is but those power numbers are rather low.
I always find that the rest periods between intervals are way under powered on some workouts. I just pedal through them at a higher power output whilst still being ensuring they are restful. I could be 20 to 50 watts higher than the requested power target. Then during the actual harder interval the power targets are more realistic etc…