I as many I understand. Have had issues with anything apart from standard motion detection push notifications to the Dahua DMSS application. IVS and any AI notifications would not forward. This has been the case on firmwares above 7.1 for the NVR 5216.
Messing around on a rainy UK afternoon. I have discovered that if the P2P function is enabled. All notifications for IVS and AI are being received!
I don't want to use P2P as I have open VPN setup.
I presume P2P opens additional ports for IVS notifications.
I can confirm this. Super annoying bug.