Don't think a log is needed for this cause I didn't see anything but here it is anyway: https://gist.github.com/Tlp300/739c0e3db88460048fb21ee3ee84b839

8 unstackables in bundle config seems to behave strangely here.

Put multiple of one type of unstackable in the bundle like this:

Then right click with it in your hand to drop the items onto the ground and you'll get this:

This was tested on both Fabric and Quilt 1.19.2, fresh instances.