Areas incorrect (alarm pixels outside area)

[BlueMax]

Describe Your Environment
zoneminder/jammy,now 1.37.63~20240924172342-jammy amd64
ppa.launchpadcontent.net/iconnor/zoneminder-master/ubuntu/ jammy main
Firefox 130.0.1
720p h264 passthrough rtsp 20fps (5fps analysis, greyscale)

Describe the bug
Analysis frames show alarm blobs outside any area. Looks like there's some shifting/offset.

[BlueMax]

The 'inactive' zone disconnects the red area/polygons and the points will be reconnected directly.
Its not the 'inactive' zone (i've deleted it and created two active zones instead, same result). Its something about the shape of the polygon itself.

This is a camera day/night switch (all pixel alarm).

Edit: The right mask is slightly modified (1 point deleted). I posted it in case you want to reproduce it. It still has the same bug.