Comment # 11 on bug 1165780 from Karl Mistelberger

I checked on a machine running Tumbleweed. Before applying the patch, 
btrfsmaintenance-refresh.path triggered btrfsmaintenance-refresh.service while 
/etc/fstab processing was underway. Journalctl listed 4 reloads of systemd.

After applying the patch btrfsmaintenance-refresh.service wasn't triggered
anymore. No reloads of systemd occured.

Additionally default state of units should be checked:

erlangen:~ # systemctl list-unit-files btrfsmaintenance-refresh.*
UNIT FILE                        STATE   
btrfsmaintenance-refresh.path    enabled 
btrfsmaintenance-refresh.service disabled

2 unit files listed.
erlangen:~ #