I've not had any issues with that version. Smart IR isn't all that great but it's never been all that great with any of my Dahuas so I set up with that in mind. Watching the firmware thread for that I'm not sure things have improved any with later versions and other issues noted have kept me from bothering to update mine.
Curious about when the new release is coming out as well. Seem the Dec 2020 is STILL the best one for IVS and the ones that have come out in 2021 are bad for IVS unfortunately.
ipcamtalk.com
Once in a while I'll get an IVS alert from a vehicle outside of any area that I have defined but it's rare. Like a few times over months. Could just be something about my setup/view.
Other than those 12/03 seems like a good stable version.