The problem is actually happening consistently. Every day the camera is still stuck in night mode. I've found the easiest way to get it to trigger day mode is just to switch the flash light on and then back off.

Hi,

I'm having a problem with a RLC-81PA camera in that most of the time it will fail to switch from night mode back to day mode. If I go in to the settings and change the threshold, this seems to trigger it to reassess the ambient light and switch to the correct mode, even if I then just setting it back to exactly where it already was. So to me it seems like a software bug - the ambient light check just isn't happening or something along those lines.
It may be coincidence and/or I may be misremembering, but I don't recall this happening before I updated firmware to v3.1.0.2557_23080802. I'm not sure which version was running before.