I also am inclined to leave bad reviews for failures, but don't take the time to write a review if it is as described.

On that youtube video, some of the polls were how many motors were replaced under warranty, or were otherwise replaced.  That is a much more accurate way to do an analysis.  I can imagine a lot of people write reviews on e-bikes complaining they wanted more speed and more acceleration and more range, such reviews mean little.  But a motor replacement is only done when needed.

I usually look at the 1 or 2 star reviews first, and I take into account how prevalent those poor reviews were, e.g., were the ones and twos 5 percent of the total or 45 percent of the total.  Sometimes I was inclined to order something on line, but after reading some of the poor reviews if there were a lot of them, and if they were for the same manufacturing defect, I suddenly decide that I really don't need that item after all.

One of my neighbors is a bike mechanic at a bike shop on a large university campus.  He said most people on campus that bring in an e-bike for some reason or other has clearly just left it in the highest gear on derailleur bikes.  They get on the bike and aim for maximum motor assist with the least amount of pedaling effort. 

Interesting.... I always read the comments which provide a wider range of opinions. People understandably make a lot more noise about failures than about systems which are trouble-free (it's the same with cars).

If it only occurs in 8 to 14, that likely rules out a problem specific to the low range planetary gears.  That said, I would expect it to occur in gears 1 to 7 too.  I was specifically thinking that if it only occurred in gears 1-7, that would imply that it was specific to the low range planetary system, but your symptoms confuse me a bit.

If it only occurred once when you shifted from below 11 to above 11, or once back from above to below, that could be from the hub torque limiting components.  For example if your skewer was loose which you already confirmed was not the case. 

One of the planetary gears is only used for gears 1 through 7.  Not for gears 8 through 14.

Does it occur after any shift?  Or does it only occur immediately after shifts from gears 1-7 up to gears 8-14, or back from 8-14 down to gears 1-7?

Gear 11 is direct drive.  Gears 12-14 are overdrive.  Does it only occur when shifting from below gear 11 to above gear 11, or from above gear 11 to below gear 11?

This may be no help at all but is at least free to try: Check rear q/r skewer tension.

Where the cracking is associate with force, it may be the axle working in the dropouts or associated. Similarly, I'd check the machine screws are properly tight on the torque reaction arm.

On the drive side, are you using a slotted/circlip-retained drive sprocket? Those can become a bit worn/loose on the carrier and make a noise on/after shifting.

EDIT: 'Came across this checklist for Rohloff-associated noises in my link files...
https://cyclemonkeylab.blogspot.com/2019/04/tech-talk-rohloff-speedhub-50014-making.html

Best, Dan.