WARNING: Managed Standby Recovery started with REAL TIME APPLY. DELAY ... ignored

In the customer's alert.log:

WARNING: Managed Standby Recovery started with REAL TIME APPLY

  DELAY 2 minutes specified at primary ignored

This message is appeared in primary's and standby's alert logs.

In primary:

Mon Aug 13 14:46:36 2018

WARNING: Managed Standby Recovery started with REAL TIME APPLY

  DELAY 2 minutes specified at primary ignored

ARC1: Standby redo logfile selected for thread 1 sequence 187706 for destination LOG_ARCHIVE_DEST_2

Mon Aug 13 14:48:10 2018

Thread 1 advanced to log sequence 187708 (LGWR switch)

  Current log# 2 seq# 187708 mem# 0: +DATAC1/SPURSTB/ONLINELOG/group_2.redo

  Current log# 2 seq# 187708 mem# 1: +RECOC1/SPURSTB/ONLINELOG/group_2.redo

In standby:

Mon Aug 13 14:46:36 2018

WARNING: Managed Standby Recovery started with REAL TIME APPLY

  DELAY 2 minutes specified at primary ignored

RFS[1]: Selected log 5 for thread 1 sequence 187706 dbid 496990843 branch 945690334

Mon Aug 13 14:46:57 2018

Media Recovery Waiting for thread 1 sequence 187706 (in transit)

Mon Aug 13 14:47:15 2018

Archived Log entry 320928 added for thread 1 sequence 187706 ID 0x22d4655a dest 1:

Mon Aug 13 14:47:15 2018

ARC4: Archive log thread 1 sequence 187706 available in 1 minute(s)

Mon Aug 13 14:47:16 2018

Media Recovery Delayed for 1 minute(s) (thread 1 sequence 187706)

Mon Aug 13 14:48:16 2018

Media Recovery Log +RECOC1/SPUR/ARCHIVELOG/2018_08_13/thread_1_seq_187706.1487.984062811

Mon Aug 13 14:48:34 2018

WARNING: Managed Standby Recovery started with REAL TIME APPLY

  DELAY 2 minutes specified at primary ignored

RFS[1]: Selected log 5 for thread 1 sequence 187707 dbid 496990843 branch 945690334

Mon Aug 13 14:48:47 2018

Media Recovery Waiting for thread 1 sequence 187707 (in transit)

Mon Aug 13 14:49:11 2018

Archived Log entry 320929 added for thread 1 sequence 187707 ID 0x22d4655a dest 1:

Mon Aug 13 14:49:11 2018

ARC0: Archive log thread 1 sequence 187707 available in 1 minute(s)

Mon Aug 13 14:49:14 2018

Media Recovery Delayed for 1 minute(s) (thread 1 sequence 187707)

Cause: 
Starting from 12.1 physical standby run as 'Real Time Apply" by default.
If you need the DELAY X minutes then you should restart managed recovery with " USING ARCHIVED LOGFILE" clause:

ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT  USING ARCHIVED LOGFILE

;