NAT (not SNAT) not preserving client source port

In version 11 , ltm drops the connection without sending RST and it doesn't add it again when new trafic comes.

it was not dropped here. i used hping to send push flag when connection was not in connection table.

e.g.

 version

[root@B4200-R76-S10:Active:Standalone] config  tmsh show sys version | grep -A 5 Product
  Product  BIG-IP
  Version  11.5.1
  Build    8.0.175
  Edition  Hotfix HF8
  Date     Mon Feb  9 00:49:11 PST 2015

 nat

[root@B4200-R76-S10:Active:Standalone] config  tmsh list ltm nat test
ltm nat test {
    inherited-traffic-group true
    originating-address 200.200.200.101
    traffic-group traffic-group-1
    translation-address 101.101.101.101
}
[root@B4200-R76-S10:Active:Standalone] config  tmsh list ltm virtual
[root@B4200-R76-S10:Active:Standalone] config 

 client

[root@centos101 ~] hping -P -c 1 -d 100 101.101.101.6 -p 80
HPING 101.101.101.6 (eth1 101.101.101.6): P set, 40 headers + 100 data bytes
len=46 ip=101.101.101.6 ttl=63 DF id=0 sport=80 flags=RA seq=0 win=0 rtt=1.3 ms

 trace

[root@B4200-R76-S10:Active:Standalone] config  date; tmsh show sys connection
Tue Mar 10 03:59:25 PDT 2015
Sys::Connections
Total records returned: 0

[root@B4200-R76-S10:Active:Standalone] config  tcpdump -nni 0.0 -s0 port 80
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on 0.0, link-type EN10MB (Ethernet), capture size 65535 bytes
03:59:28.959071 IP 200.200.200.101.1760 > 101.101.101.6.80: P 1126296173:1126296273(100) win 512 in slot1/tmm3 lis=
03:59:28.959134 IP 101.101.101.101.1476 > 101.101.101.6.80: P 1126296173:1126296273(100) win 512 out slot1/tmm3 lis=/Common/test,SRC_NAT