Snapshot request handler provided empty image buffer - Kuna Light Camera

[mick101]

Unable to get stills in Home App from a Kuna Light Camera. The current setup only allows still as livestream is still WIP.
I was able to get this working well for over a year but it stopped, since I added support for Ring Doorbell and Blink Camera to my Hoobs container this week.

Now, the camera in Home app shows No Response and I keep getting the "empty image buffer" error in the Hoobs logs. I've enabled Debug for the FFMPEG:

[Camera FFmpeg] [DoorCam] Snapshot requested: 1280 x 720
[DoorCam AB43] Snapshot request handler provided empty image buffer!
[Camera FFmpeg] [DoorCam] Fetching snapshot took 0.031 seconds.

From within my Hoobs container, I was able to successfully run a wget command against the URL for the Kuna Light accessory.
And have successfully tested the URL on my windows machine.

I'm running:

Hoobs 3.3.5 in a container on my QNAP NAS. (upgrading to Hoobs 4 not possible)
Node version 14.16 (upgrading isn't possible)
homebridge-camera-ffmpeg version 3.1.4
homebridge-kunalight version 1.0.2

Here's my FFMPEG config:

"name": "DoorCam",
"unbridge": true,
"videoConfig": {
"source": "-i http://127.0.0.1:3000/OOK123456790",
"stillImageSource": "-i http://127.0.0.1:3000/OOK123456790",
"maxStreams": 2,
"maxWidth": 640,
"maxHeight": 360,
"maxFPS": 30,
"forceMax": true,
"debug": true

I've tried to use both the LocalHost IP as well as the network IP.

UPDATE:
While waiting for your answers, I created another instance of Hoobs and installed only the Kunalight and Camera-FFMPEG plugins and set Kuna's Cam as an unbridged accessory. Everything works. Could there be some compatibility issue with Ring and Blink?