I am running Fed SB Version: 30.20190413.n.1 (2019-04-13T17:46:44Z) with some layered and local packages on a Intel NUC8i7BE. Installed on a Samsung 970 EVO (500GB, M.2 2280).
Fed SB freezes since version 30 regularly once or twice a day. Mouse freezes. Keyboard too. And network stops too (no more ping).
I have to force a power-off. I can not examinate more in depth.
I tested also with Fedora-Workstation-Live-x86_64-30_Beta-1.8.iso running as live from USB stick on same machine. This way no freezes occured.