docker macvlan hosts stop working after kernel 5.4.11

Hi,

I have set up some pihole docker containers using macvlan network driver. After upgrade to my linux kernel 5.4.11, the hosts are accessible via the docker host but not from other hosts on the network like before.
❯ docker inspect wifi_172
[
{
"Name": "wifi_172",
"Id": "cc3809eb470525c3f6af4c01a1571be73e0902e6436006259cf664bf052cd7eb",
"Created": "2018-04-03T10:37:21.975032167-07:00",
"Scope": "local",
"Driver": "macvlan",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "172.16.6.0/24",
"Gateway": "172.16.6.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"925f0389089fe6d290017d3d91c9cbdeb0e37967c21aca8d498bf20c4f421b80": {
"Name": "wifi-hole",
"EndpointID": "ce72a371ed63d8573faa0d9c914198b9f629a185e2cfa07d264797802aa28a4b",
"MacAddress": "02:42:ac:10:06:fe",
"IPv4Address": "172.16.6.254/24",
"IPv6Address": ""
}
},
"Options": {
"parent": "van0.172"
},
"Labels": {}
}
]

The issue names no repository files, tests, or entry points. Start by reproducing the macvlan setup with kernel 5.4.11 and the shown network configuration, comparing access from the Docker host with access from another network host. Done means identifying and fixing the regression so macvlan containers are reachable from other hosts.