Netwatch icmp

[ericdriver]

Hello,
Every first packet in netwatch test has incorrect ICMP checksum and no reply, as a result there is packet loss(1/30) in each test. Do you have any ideas?
RouterOS v7.7

/tool netwatch
add disabled=no down-script="" host=192.168.1.1 http-codes="" interval=31s packet-count=30 packet-interval=1s packet-size=64 start-delay=1s test-script="" thr-loss-percent=10% timeout=500ms \
    type=icmp up-script=""

[mrquery]

Same issue here.
No clue to why this is happening.
I'm using v7.18.2, so the issue still exists.
Hopefully someone knows the answer?

Interesting fact: "It only occurs on Sequence Number: 0"
All other pings are doing fine...