http request always blocked in container of k8s cluster pod - kubernetes

Question

Stages:
connect a container's shell
curl www.xxx.com (//this will always waiting )
...
Then I use tcpdump in host machine and filter by ip
tcpdump -i eth0 host ip
3 11:05:05 2019/12/2 133.5701630 10.171.162.231 111.111.222.333 TCP TCP: [Bad CheckSum]Flags=......S., SrcPort=48836, DstPort=HTTP(80), PayloadLen=0, Seq=126843476, Ack=0, Win=29200 ( Negotiating scale factor 0x7 ) = 29200
4 11:05:05 2019/12/2 133.5704230 111.111.222.333 10.171.162.231 TCP TCP:Flags=...A..S., SrcPort=HTTP(80), DstPort=48836, PayloadLen=0, Seq=3228156738, Ack=126843477, Win=2896 ( Negotiated scale factor 0x9 ) = 1482752
5 11:05:05 2019/12/2 133.5704630 10.171.162.231 111.111.222.333 TCP TCP: [Bad CheckSum]Flags=...A...., SrcPort=48836, DstPort=HTTP(80), PayloadLen=0, Seq=126843477, Ack=3228156739, Win=229 (scale factor 0x7) = 29312
6 11:05:05 2019/12/2 133.5705430 10.171.162.231 111.111.222.333 HTTP HTTP:Request, GET /api/test, Query:debug
7 11:05:05 2019/12/2 133.5707110 111.111.222.333 10.171.162.231 TCP TCP:Flags=...A...., SrcPort=HTTP(80), DstPort=48836, PayloadLen=0, Seq=3228156739, Ack=126843596, Win=6 (scale factor 0x9) = 3072
The tcp flag is
src -> dst syn
dst -> src syn/ack
src -> dst ack
src -> dst ack/push
dst -> src ack
The curl command will waiting a long time and then throw a timeout error. in normal request there has a dst -> src ack/push packet, but I never received.
I don't know why and how to resolve it.
--- my deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: test-app-dep
labels:
app: test-app
version: stable
spec:
replicas: 2
selector:
matchLabels:
app: test-app
version: stable
template:
metadata:
labels:
app: test-app
version: stable
spec:
containers:
- image: test-app
name: test-app
livenessProbe:
httpGet:
path: /health/status
port: 80
initialDelaySeconds: 3
periodSeconds: 10
ports:
- containerPort: 80