Gotcha, I see the issue now. The left-handed negative scales, used to mirror geometry, are leading to exports with:
incorrect winding orders (and/or side orientations) in a few places, including the feet’s edges
flipped transformations in the tubes
Will investigate this week, but it will take some thought. Mirrored geometry is a tricky case to get right when rendering and exporting.
Probably not feasible for you to do, but throwing it out there anyway: these problems can be avoided entirely by mirroring your nodes via rotations instead of negative scales.
Not sure if it is a similar problem after the glb export the bottom of the chair is a little bit flipped. it seems that the rotation of the bottom of the chair does not get exported at all. 2 Meshes are not rotated correctly
the table was our fault. We still had some workarounds before exporting cause of the issues. I removed them completely but we have a problem with the chair castors.
Once this is merged, you should be good to go. I missed a sign when redo-ing our conversion function, which was important for managing zero-rotation cases