Interval time and activity time don't match

It’s been a while since I have posted because I haven’t been running into many bugs, however today we noticed one on my wife’s trainer workout.
The speed sensor was not registering for the first part of her ride, then started working.
Garmin shows a 1-hour workout. Intervals shows a 34-minute workout with a 1 hour long interval and an incorrectly calculated training load. I manually edited her load, but I can not edit the activity time.
Thoughts?

The easiest solution is to strip the speed and distance data completely. https://www.fitfiletools.com/#/stripper#view
Load and duration will be correct after reimporting the modified file. Speed and distance will obviously be zero.

Intervals.icu calculates and displays moving time not elapsed time. With the dodgy speed data the moving time calc isn’t working out. I think if you use the too suggested my MedTechCD and get rid of the speed trace and upload it will probably come right.