Please, if possible, add following in the 99-default.preset file:

  enable dm-event.socket
  enable lvm2-lvmetad.socket
  enable lvm2-monitor.service

dm-event.socket + lvm2-monitor.service is an essential part for monitoring the use of lvm2 snapshots and mirrors (the dm-event.socket also as a service for any other potential device-mapper subsystem that needs its devices to be monitored).

The lvm2-lvmetad.socket is essential to instantiate the lvmetad daemon that keeps track of metadata and PVs that appear/disappear on a system and to avoid further scans, making lvm2 to run more efficiently (also removing the dependency on udev-settle).

(Note: the dmeventd daemon (dm-event.socket) and the lvmetad daemon (lvm2-lvmetad.socket) are instantiated on-demand, on the first access.)

If I get it right, this should be OK with the Fedora policy https://fedoraproject.org/wiki/Starting_services_by_default (but correct me if I'm wrong).