Routing ping check block reports incorrect interface ping check as DEAD

PeterUK

USG FLEX 200H V1.20(ABWV.0)ITS-m4447

USG40

OPT WAN IP

VLAN443 192.168.44.2 255.255.255.240

Flex200H

with a routing rule

incoming VLAN47

next hop VLAN443

ping check 192.168.44.2

VLAN443 192.168.44.8/28 gateway 192.168.44.2

ping check

no-ip.org

bounceme.net

any

When on USG40 I block VLAN443 to Zywall for just the routing rule it causes

Policy Route
Connectivity check down, policy route rule 7 will be disabled.

Connectivity Check
The link status of VLAN443 interface is DEAD.

However the interface is correctly not dead till I do on USG40 block VLAN443 to OPT