We see daily at around 9:30am SGT, the Thai stock has replicated best_bid1, best_bid3 values, then clear to 0. Is that normal behavior ?
WHA.BKd.  it duplicate BEST_BID1 with BEST_BID3 at +4.62
and BEST_BID1 clear to 0 at 10:30:02.319344.
[Mon Jul  8 10:30:02.246598] SSL_ET_ITEM_UPDATE  Chan:
0 ServiceName: RSF ItemName: WHA.BKd DataFormat: 2 DataDescriptor: 0
DataLength: 114 SequenceNum: 0 ClientItemTag: 0
<FS>316<US>XX<GS>WHA.BKd<US>352
TIMACT 
: TIME 
5  : [02:30]
TIMACT_MS 
: UINT 
8  : [+9002164]
BOOK_STATE 
: ENUM 
1  : [1]
BEST_BID1 
: REAL 
5  : [+4.62]
BEST_BSIZ1 
: REAL 
8  : [+1000000]
BEST_BID2 
: REAL 
5  : [+4.50]
BEST_BSIZ2 
: REAL 
7  : [+100000]
BEST_BID3 
: REAL 
5  : [+4.30]
BEST_BSIZ3 
: REAL 
5  : [+5000]
[Mon Jul  8 10:30:02.318983] SSL_ET_ITEM_UPDATE  Chan:
0 ServiceName: RSF ItemName: WHA.BKd DataFormat: 2 DataDescriptor: 0
DataLength: 138 SequenceNum: 0 ClientItemTag: 0
<FS>316<US>XX<GS>WHA.BKd<US>464
TIMACT 
: TIME 
5  : [02:30]
TIMACT_MS 
: UINT 
8  : [+9002169]
BOOK_STATE 
: ENUM 
 1  : [1]
BEST_BID2 
: REAL 
5  : [+4.64]
BEST_BSIZ2 
: REAL 
7  : [+250000]
BEST_BID3 
: REAL 
5  : [+4.62]
BEST_BSIZ3 
: REAL 
8  : [+1000000]
BEST_BID4 
: REAL 
5  : [+4.58]
BEST_BSIZ4 
: REAL 
7  : [+300000]
BEST_BID5 
: REAL 
5  : [+4.50]
BEST_BSIZ5 
: REAL 
7  : [+600000]
[Mon Jul  8 10:30:02.319344] SSL_ET_ITEM_IMAGE  Chan:
0 ServiceName: RSF ItemName: WHA.BKd DataFormat: 2 DataDescriptor: 0
DataLength: 936 SequenceNum: 0 ClientItemTag: 19945184 PreviousName: 
NextName:  GroupId: 1 ItemState: SSL_IS_OK StateInfoCode: SSL_INFO_NONE
Text: All is well
<FS>318<US>XX<GS>WHA.BKd<US>38<US>495
PROD_PERM 
: UINT 
4  : [7112]
DSPLY_NAME 
: STRING  14  : [WHA
CORPORATIO]
TIMACT 
: TIME 
5  : [02:30]
CURRENCY 
: ENUM 
3  : [764]
ACTIV_DATE 
: DATE  11  :
[08 JUL 2019]
RECORDTYPE 
: UINT 
3  : [113]
NO_BIDMMKR 
: REAL 
2  : [+0]
NO_ASKMMKR 
: REAL 
2  : [+0]
BEST_BID1 
: REAL 
2  : [+0]
BEST_BID2 
: REAL 
5  : [+4.64]
BEST_BID3 
: REAL 
5  : [+4.62]
BEST_BID4 
: REAL 
5  : [+4.58]
BEST_BID5 
: REAL 
5  : [+4.50]
BEST_ASK1 
: REAL 
5  : [+4.72]
BEST_ASK2 
 :
REAL  5 
: [+4.74]
BEST_ASK3 
: REAL 
5  : [+4.78]
BEST_ASK4 
: REAL 
5  : [+4.82]
BEST_ASK5 
: REAL 
5  : [+4.86]
BEST_BSIZ1 
: REAL 
6  : [+10100]
BEST_BSIZ2   :
REAL  7 
: [+250000]
BEST_BSIZ3 
: REAL 
8  : [+1000000]
BEST_BSIZ4 
: REAL 
7  : [+300000]
BEST_BSIZ5 
: REAL 
7  : [+600000]
BEST_ASIZ1 
: REAL 
7  : [+122500]
BEST_ASIZ2 
: REAL 
7  : [+100000]
BEST_ASIZ3 
: REAL 
8  : [+2000000]
BEST_ASIZ4 
: REAL 
7  : [+500000]
BEST_ASIZ5 
: REAL 
8  : [+1059000]