Connectivity issue till re-read syctl

Installing and Using OpenWrt
1

Hi guys.

I have openwrt 19.07.2 running on tplink C7v5
after booting I'm not able to ping LAN and WAN resources by FQDN, also openwrt logd is not sending logs to remove syslog useing IP (not FQDN)

after I manually re-read sysctl settings everything becomes working correctly. My sysctl.conf is pretty simple:

root@ap:/home/sam# cat /etc/sysctl.conf 
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.netfilter.nf_conntrack_acct=1
net.netfilter.nf_conntrack_checksum=0
net.netfilter.nf_conntrack_max=16384
net.netfilter.nf_conntrack_tcp_timeout_established=7440
net.netfilter.nf_conntrack_udp_timeout=60
net.netfilter.nf_conntrack_udp_timeout_stream=180
vm.min_free_kbytes = 0

root@ap:/home/sam#

let's assume some settings in sysctl.conf wrong, but if I remove all from sysctl.conf it works just after re-read defaukt sysctl.

I meant. Even sysctl.con has no records still reloading (e.i "sysctl -p") it force router to work properly.

What it could be?

Thank you in advance.

2 
cat /etc/sysctl.d/* | grep -v '^#'
3 
root@ap:/home/sam# cat /etc/sysctl.d/* | grep -v '^#'

kernel.panic=3
kernel.core_pattern=/tmp/%e.%t.%p.%s.core
fs.suid_dumpable=2

fs.protected_hardlinks=1
fs.protected_symlinks=1

net.core.bpf_jit_enable=1

net.ipv4.conf.default.arp_ignore=1
net.ipv4.conf.all.arp_ignore=1
net.ipv4.ip_forward=1
net.ipv4.icmp_echo_ignore_broadcasts=1
net.ipv4.icmp_ignore_bogus_error_responses=1
net.ipv4.igmp_max_memberships=100
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_keepalive_time=120
net.ipv4.tcp_syncookies=1
net.ipv4.tcp_timestamps=1
net.ipv4.tcp_sack=1
net.ipv4.tcp_dsack=1

net.ipv6.conf.default.forwarding=1
net.ipv6.conf.all.forwarding=1

net.netfilter.nf_conntrack_acct=1
net.netfilter.nf_conntrack_checksum=0
net.netfilter.nf_conntrack_max=16384
net.netfilter.nf_conntrack_tcp_timeout_established=7440
net.netfilter.nf_conntrack_udp_timeout=60
net.netfilter.nf_conntrack_udp_timeout_stream=180
root@ap:/home/sam#