I can confirm this latest beta for V3 fixed the Floodlight V1 audio playback issue.
On a separate note, I did the same network test with this V3 beta firmware 4.36.12.9751. I turned off the network at 7:55am and turned it back on at 9:55am. I am only able to view the playback footage until 8:25am in the app. After 30 min of internet outage, the recordings start saving in a randomly generated dated folder with a incorrect timestamp. As a result, you need to physically remove the micro SD card to play it back in a phone or PC. Flashing this V3 beta firmware will cause to act exactly like the OG cameras. The V3 stable firmware of 4.36.11.8391 can playback the full 2 hour no problem.
Log ID: 1394405
Cam V3 FW is 4.36.12.9751 beta
App version is v2.50.2 (442)
Plugin version is 2.50.0.24