Synology Docker run zerotier - I can't connect to NAS when reboot docker

I’m planning to upgrade from DSM6 to DSM7, so I’m trying to get zerotier running in docker.
Before this, I installed the zerotier spk package (zerotier_x64-1.2.8r0), it works fine.
Then I try to install zerotier docker (Synology NAS | ZeroTier Documentation), first I join network ID,it works OK, I can ping NAS from my other zeritier device. then I stop docker and run (or restart docker), it works abnormally, the zerotier route table is lostd and the ZT interface is error(no this device), and the docker log show much “reset the connection by peer”. The connection can only be restored in the following ways :
sleep 2m
docker exec -it zt zerotier-cli leave
sleep 1m
docker exec -it zt zerotier-cli join

The above failure only occurs in DSM 6.2.3 and DSM 6.2.4.
DSM 7.0 and DSM 7.0.1 is OK.

I have provided the following DSM 6.2.3 and DSM 7.0.1 VMware image:

ds918+7.0.1.7z
https://drive.google.com/file/d/1t1vB2ODeG_0GSAdMd9vl4v-qliQYNUKG/view?usp=sharing
md5:CDDCE1E3BAAB76BB9DE29F64CADA398F

ds918+6.2.3.7z
https://drive.google.com/file/d/15dR554Q-f9sa-uHDqM53oHH5OFKNViFt/view?usp=sharing
md5:A558123C01150E614FE8055645115501

Can someone help me solve this problem?
I dare not upgrade DSM 7.0.1 now.
I’m not sure if this issue is related to DSM version. Now only DSM and docker version are different.I tried the earlier docker image (1.4.6) ,it looks the same.

Reference link: