You might have to stabilize this in parts, so stabilize for the floor to be solid (barring any jello rolling shutter issues), stabilize for the ceiling, stabilize for the horizon, and then use Mocha masks to composite them together?
The problem with 360 stabilization is whatever you stabilize, other parts will wiggle if they were moving differently in the stitch or a host of other issues. Usually one reorient is sufficient to stabilze a 360 shot, and sometimes just using reorient twice on the same shot in the same way will fix little hiccups. But as I say, some shots might be trickier and require some compositing depending on the stitch type used, because some stitchers try to compensate for movement and they can really make your mileage vary.
TLDR: Try reorient again first, if that doesn’t work, solve for the areas you need to be solid that will be noticable if they wiggle and composite them together.
Let me know how it goes!