DFS Lock Handle During RMAN Backup on Standby Database

Hi all!
Some time ago I faced some session on wait event DFS Lock Handle during a RMAN Backup on Standby Database. Btw, running backup on a Standby is a very interesting approach to avoid running backups on primary, so all nodes can be fully dedicated to application ends.

Turn that in my situation I noticed there was a lock with my apply process. The fix? Quite simple: Cancel apply process, run backup, and restart apply again. In my case, using DG Broker:

dgmgrl
connect / 
show configuration
show database 
edit database  set state = 'apply-off';

— Run Backup

edit database set state = 'apply-on';

Hope it helps!
Cheers!