Onvif unreliable off event causes endless recordings

[porterdcarnegie]

Zoneminder v1.37.48 git master 2024-01-04.
Camera: Besder (cheap-o), h265 HEVC only 20fps@1080p, chipset: XM540.

Issue: Camera is sporadically not sending onvif off events or seems like onvif on/off events are inverted.
This has the effect that alert state will be left on after motion finished and New Event will keep recording forever.

I worked around this by setting the two occurrences of Event_Poller_Closes_Event to false in zm_monitor.cpp.
Maybe there's no real solution other than a toggle option to disable this since it could be the camera that is malfunctioning.