Mine has that same firmware.. And as far as i know, that should be the latest (maybe even beta)
Most connection issues could be fixed by (force) closing the app.. In my oneplus2 its enough if i swipe mooshi-app off from recent apps list.
Also resetting your mooshimeter by pressing the button beside memorycard slot should help (but then it would appear as bootloader for a while).
If repeating those would not get you anywhere, try to get to firmware update and try it with legacy-mode. Updating might take ~10 minutes, but after couple tries you would know that you are really screwed.. Or at least should try again with other phones.