Sorry to hear you're having a wifi problem with your unit. Can you raise a Support ticket via our Support Portal and we'll take a look at this for you?
Regarding the switch from HDR+ to HDR On - yes that's definitely something I recommend in fact, I suggest you also switch from stitching on board the unit to saving to RAW only and then post processing the data on a PC using Immersive Studio as that's the fastest workflow you can get.