Interesting new data point. I also have a IPC-HDW5231R-ZE, which I also updated to the same software version, V2.800.0000005.0.R, Build Date: 2019-03-25. Earlier today, it stopped recording as the card was/is almost full (120693.3M/122066.2M). Most of my recordings on the 5231 are 50MB, so there...