I have 2 Cam v3. The first one have changed its night mode from Color to B & W, after 3 weeks. I bought 2nd one and it did the same as .
I don’t understand why Cam V3 worked good in first 3 weeks in color mode. It doesn’t make any sense to me about firmware update.
If you want to test, just buy a new Cam V3 and you will know exactly what is going on.