no response false flag - homebridge characteristic warning

[Sujovian]

I'm running v 2.9.7 on a child bridge under hb 1.3.8. The hb log is throwing this error:

This plugin slows down Homebridge. The write handler for the characteristic 'Active' on the accessory 'Marantz NR1603 D5EE' didn't respond at all!. Please check that you properly call the callback! See [(https://git.io/JtMGR] for more info).

The receiver shows as "no response" in HomeKit, but it actually works perfectly. the NoResponse is some kind of false flag that may be related to the above issue?

In my setup the receiver is connected to the router via wired ethernet.

here's the config file:
{
"debugToInfo": false,
"devices": [
{
"name": "Marantz NR1603",
"ip": "192.168.1.116",
"port": "80",
"zone": 1,
"switchInfoMenu": true,
"defaultInputID": "TV",
"inputs": [
{
"inputID": "TV",
"name": "LG OLED",
"defaultVolume": 64
},
{
"inputID": "MPLAY",
"name": "Fire TV",
"defaultVolume": 60
},
{
"inputID": "NETWORK",
"name": "Airplay",
"defaultVolume": 60
},
{
"inputID": "CD",
"name": "Alexa Echo",
"defaultVolume": 25
}
]
}
],
"volumeControl": [
{
"name": "NR1603 volume",
"ip": "192.168.1.116",
"zone": 1,
"controlType": "speaker",
"port": "80",
"volumeLimit": 75
}
],
"_bridge": {
"username": "0E:63:62:47:AC:49",
"port": 59352
},
"platform": "DenonAVR"
},