Updated to Kernel 5.8-rc3, and the reboot problem with VMware 15.5.6 still persists.   Tested with Fedora ‘Rawhide’ kernel 5.8.0-0.rc2.20200625git8be3a53e18e0.1.fc33.x86_64, with same failure.    Details posted to VMware VMTN some days ago, but no response so far..

As another data point, even tested with old VMware 14.1.7 and Kernel 5.8-rc2, and the same problem occurred.

Robert Gadsdon.  July 1st, 2020.