How a archive log file show corrupted in standby database but good in primary DB?

Hi every one,

I got two physical standby database , this morning both SBY DB report corrupted archive log and not to apply it,

I ran "Alter system dump logfile 'archivelog/1_45090_917855049.arc'; in all three DB, the primary return no error but both SBY return

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ORA-00354: corrupt redo log block header

ORA-00353: log corruption near block 5640 change 1218586842 time 08/31/2017

20:39:45

ORA-00334: archived log:

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Then I ran md5sum on all three log file in corresponding system all return same value, so I assume these 3 files are identical.

Any possible reason both SBY are check as error?

Any help is much appreciated.