Just did a significant update of Fedora 28, which always gives me the jitters wrt P-Tools. Notably: Kernel updated from 4.17.19 to 4.18.5, and Gnome to 3.28.2. All still appears well under P14, even under convergence.
Follow-up: Noticed a new minor annoyance: Some times while in convergence, if you shut down Fedora it 'forgets' the window size you started with at boot up. What you get is the smallest window possible, then have to stretch it back to size. Weird. Current versions: Parallels 14.0.1 (45154) Fedora 28, kernel 4.18.7-200 Gnome 3.28.2